Thursday, October 31, 2019
Old Testament and New Testament Essay Example | Topics and Well Written Essays - 1500 words
Old Testament and New Testament - Essay Example This essay analyzes and then compares the passages from the Old and the New Testament. The fact of similarities between them is well established, if one considers the fact that the prophecies of the Old Testament were fulfilled in the New Testament. The several ways that the passages of the New Testament and the Old Testament bear similarities shall be elaborated in this paper. Events like the Passover and the Last Supper justify the similarities between the New Testament and the Old Testament. The lives of great people in the Bible like Moses, David, Elijah, John and Jesus can also be used as a basis for comparison between the Old and the New Testament. The Last Supper was also a feast of unleavened bread just like the Passover in the book of Exodus. This is a clear sign that the Last Supper of Jesus with his twelve disciples evolved from the Passover in the book of Exodus. Another way that the New Testament fulfilled the prophecy or interpreted the message of the Old Testament was in the life of Moses. From the events that took place in the Bible and the characters of notable people in the Bible, it has been clearly shown that the New Testament is an interpreter of the Old Testament. The Old Testament and the New Testament were written by different authors that lived through different timelines, but the fact that the Bible as a whole was inspired by God shows that there must be a link between the Old Testament and the New Testament and it is this link that has been proven and established in this paper.
Tuesday, October 29, 2019
Reading and Writing with an Attitude Essay Example | Topics and Well Written Essays - 250 words
Reading and Writing with an Attitude - Essay Example Ultimately, although procrastination can adversely affect all forms of production and output, it is an especially bad habit with regards to the process of writing due to the fact that the writing process cannot be completed in a single sitting. As a function of the reading, planning, outlining, drafting, and revising process, it is necessary to budget a great deal of time for the writing process in order to make sure that it is complete and relevant to the subject matter or requirements that have been set out. Moreover, proofreading the finished product also takes time and seeking to make any last minute additions for relevance takes time as well. With regards to how I acquired this particular shortcoming, it can be simply enough understood that it was acquired as a result of improper time management early in my scholastic endeavors. With regards to the impacts that it has had, these can be understood to be wholly negative. Ultimately, as a means of correcting this habit, it has been necessary for me to seek to meticulously budget my time so that procrastination in the writing process cannot even be a
Sunday, October 27, 2019
Vehicle Anti-lock Braking Traction Control
Vehicle Anti-lock Braking Traction Control Understand vehicle anti-lock braking traction control and Integrated dynamic stability control systems. Introduction I have learned that the anti-lock braking systems (ABS) are electronic systems that monitor and control wheel slip during vehicle braking, as well as the ABSs can improve vehicle control during braking, and reduce stopping distances on slippery road surfaces by limiting wheel slip and maintaining lockup. Also, the reducing wheel spin improves the vehicle stability and control during braking, since stability increases as wheel slip decreases. Assessment Criteria 2.1 It is correct to assume that due to the increased loads on steered wheels and wider tyres there is a large effort required at the steering wheel it makes the driver ability to control the car very tiring and difficult, especially when steering the vehicle at very low speeds like parking and reversing. There are improvements such as an increase in the mechanical efficiency of the steering system or lowering steering box ratios to help reduce the driver fatigue, however if the steering mechanism is not limited the increased number of turns made by the steering wheel to move it from lock to lock becomes disturbing. When the steering effort exceeds a safe maximum, a method must be found and power-assisted steering (PAS) seems to answer certain requirements: 1. It must be fail-safe, if the power system fails, the driver must still be able to retain effective control. 2. The degree of assistance must be proportional to the effort applied by the driver, and the driver must be able to continue to have the feel of the wheels. On light vehicles, hydraulic and electronic power the assistance is used to help the driver steer the vehicle. Hydraulically operated power-assisted systems run by a constant pressure or constant flow layout. The diagram below, shows the essential components required to operate a constant flow system with rack-and-pinion steering system. In addition to the normal steering components, the system requires: A pump, and A control valve. Hilliers (2012) Diagram 1 showing the PAS System (Power-Assisted Steering) in a hydraulic system: Hilliers (2012) The hydraulic pump shown has the reservoir for the hydraulic fluid as the contained component of the design. The reservoir supplies the hydraulic fluid to the power-steering control valve that is joined to the pinion shaft. When it is driven on a straight ahead position the valve is placed in a neutral position, allowing the fluid to go around continuously through the hydraulic circuit. The fluid pressure acting on the power cylinder is equal so no assistance is given to the steered wheels. When the steered wheels are turned through the action of the driver giving movement to the pinion shaft and control valve, then the torsion bar connected to the control valve to the pinion shaft will twist. The torsional movement of the control valve will direct fluid pressure from the pump through to one side of the power cylinder. When the fluid pressure is acted upon on the power cylinder it creates a force to the side of the cylinder providing the necessary assistance to the driver in turning the steered wheel, the control valve normally sits in the neutral position, thus providing equal pressure to both sides of the power cylinder and requiring no longer the assistance is required. Hilliers (2012) The hydraulic pump is an eccentric rotor or also named a vane-type driven by the vee belt from the engine crankshaft. Some of the hydraulic pumps are put in place onto the new cars that are electronic to improve on the performing of the engine by not drawing power from the belt via the crankshaft. The pump is supplied by hydraulic fluid from either an integral reservoir or a remote arrangement. The type of fluid used is usually an automatic transmission fluid (ATF) which has low viscosity. The pressure is created in the pump by the rotation of the vane or rotor, the fluid under pressure is sent to the spool control valve. The maximum pressure that the pump can produce is normally around 7MNm squared or 1,0001bf in squared. This is controlled by a pressure relief valve. The normal pressure is generally proportional to the engine speed because of the direct linkage with the power-steering pump. Any excess pressure released by the pressure relief valve is redirected back to the fluid reservoir. Nowadays in most modern production vehicles a far on power steering system will also include features such as a system to alter the power assistance depending on the road and engine speed. This is done by fitting a valve in the system allowing full force during low speed manoeuvring increasing the assistance for the driver. During high road speeds and engine speeds the valve will modulate the pressure through the hydraulic steering system limiting the amount of assistance and enabling the driver to feel the road and the steered wheels. Vehicle handling is very much improved and so is the stability of the car. The control valve, shows a kind of rotary motion type control valve which is regulated by a torsion bar which is positioned between the steering shaft and the pinion of the steering box. The valve is commonly called a rotary control valve which is a shaft with a series of flutes encased by a sleeve which has the same number of internal axial grooves. The ports situated around the outside of the sleeve and shaft pass the oil from the pump supply to the lines connected to the ram chambers. The operation principles of the PAS system provide the following control functions: Road speed sensitive power assistance Assisted steering return Both functions are the result of the motor voltage control by the ECU. The ECU determines the voltage supply to the motor based on the following data: The force applied to the steering wheel by the driver The vehicle speed The steering angle position and The speed of steering angle change The torque sensor measures the input force applied by the drive, when the driver turns the steering wheel the torsion bar between the two halves of the steering column will twist. The amount of twist is proportional to the force applied. Diagram 2, The Rotary-type control valve operation Hillers (2012) Assessment Criteria 2.2 The active suspension system is now being commonly used for riding comfort, running safety, they control the vertical movement of the wheels relative to the chassis or vehicle body with an on-board system, rather than in a passive suspension in which the movement is being determined completely by the road surface. Active suspension may be generally divided into two main classes, pure active suspension and adaptive semi-active suspension. Active suspensions only vary the shock absorber firmness to match changing road conditions, the active suspension use some type of actuator to raise and lower the chassis independently at each wheel. The technologies allow the manufacturers nowadays to achieve a greater ride of quality and car handling by keeping the tyres perpendicular to the road in corners allowing for better traction control. The on-board computer detects body movement from the sensors throughout the vehicle and using this data controls the action of the active and semi-active suspension. Active suspension eliminates body roll and pitch variation in most driving situations including cornering, accelerating, and braking. The active suspension also known as computerized ride control have components like a computer or two ECU, adjustable shocks and springs, a series of sensors at each wheel and right through the car and an actuator or servo at each shock and spring. The components may vary slightly from manufacturer to manufacturer. The active suspension works by constantly sensing changes in the road surface and feeding that information, via the ECU to the outlying components. The components act upon the system to modify its character adjusting shock stiffness, spring rate and to improve ride performance drivability and responsiveness. Diagram 3, Active Suspension: Extremetech.com (2016) The principles of operation of an active suspension relies entirely on the computer (ECU) which detects body movement from the sensors located throughout the vehicle. The hydraulic pressure to the servo is supplied by a high pressure radial piston hydraulic pump. There are 13 sensors continually monitoring the body movement and vehicle level and supply the ABS controller with new data every ten milliseconds. Four level sensors one at each wheel measures the longitudinal and transverse body acceleration. At each hydraulic cylinder a pressure sensor monitors the hydraulic pressure. As the ABS controller receives and possesses data, it operates four hydraulic servos, each mounted in series on a spring strut, besides each wheel. Almost immediately the servo regulates the suspension which generates counter forces to body lean, dive and squat during several driving manoeuvres. There is a suspension strut which consists of a steel coil spring and a shock absorber connected in parallel. The Active Body Control system (ABC) also allows for self-levelling suspension which raises and lowers the vehicle in response to the ever-changing load. Every vehicle equipped with ABC has an ABC Sport button which allows the driver to adjust the suspension range for different driving style preferences. The feature allows the driver ton adjust the suspension to maintain a more level ride in a more demanding driving conditions. Motor-car.co.uk (2016) Assessment Criteria 2.3 The steering angle sensor (SAS) is a critical part of the ESC system that measures the steering wheel position angle and rate turn. A scan tool can be used to get the data in degrees. The SAS, which is located, in a sensor cluster in the steering column. The cluster always has more than one steering column. The ESC module must receive two signals to confirm the steering position. The signals are often out of phase with each other. The analog SASs are very much alike to the throttle position sensors, SASs are wired with a 5-volt reference, chassis ground and signal output and can be tested via a port under the steering column. When the steering wheel is turned, the SASs produces a signal that varies between 0 and 5 volts as the wheel is turned 360 degrees. It is possible to observe the 0 to 5-volt signal with meters connected to the SAS sensors. When the wheels are straight forward the sensors reads about 2.8v and 4v. If the readings are the same the two sensors could be shortened tog ether. Most vehicles produce a positive voltage turning right and a negative voltage turning left. A multi-meter could be used to test the voltage signal produced by the SAS sensors. Knowyourparts.com (2016) The self-levelling and ride control systems have fault diagnosis in most vehicles for they incorporate a self-diagnostic facility that will illuminate a malfunction indicator lamp (MIL) if a fault is detected. If you suspect a fault with a self-levelling or ride control system a visual inspection is normally conducted for wear and tear. A scan tool is connected to the diagnostic connector and fault codes are retrieved. Diagram 4, examples of suspension system fault codes: Stoakes Graham (2012) Antilock braking systems (ABS) are electronic systems that monitor and control wheel slip during vehicle braking. ABSs may improve vehicle control during braking and reduce stopping distances on slippery road surfaces by limiting wheel slip and minimizing lockup. Reducing wheel slip improves vehicle stability and control during braking, for stability increases as wheel slip decreases. A simple braking system consists of a master cylinder and four wheel cylinders. When the brake pedal is pressed the piston in the master cylinder forces the liquid out of the cylinder. The liquid pressed the two pistons in the wheel-cylinders outwards. The two pistons push the brake shoes outwards. One major component of the anti-lock braking system includes the master cylinder, when the pedal is pressed the primary piston moves to the left, when it crosses the bypass port the liquid is forced along the pipe lines to the wheel cylinders. When the pedal is released the primary piston is moved backwards. Diagram 5, Inside the Master Cylinder: Auto.howstuffwirks.com (2016) The principles of the ABS system are the following: The skidding and loss of control is caused by the locking of the wheels. The release and reapply of the brakes pedal will avoid the locking of the   wheels which in turn avoids the skidding. This is exactly what an antilock braking system does. The pressure modulation works when the brake pedal is pumped or pulsed, the pressure is quickly applied and released at the wheels. This is called pressure modulation, which works to prevent the wheels from locking. The ABS system can modulate the pressure to the brake as often as 15 times per second. ABS precisely controls the slip rate of the wheels to ensure maximum grip force from the tyres and therefore ensures easy manoeuvre and stability for the driver of the vehicle. The slip rate during ABS operation varies, the target slip rate can be from 10 to 30%. 0% slip means the wheel is rolling freely, while 100% means the wheel is fully locked. A slip rate of 25% means the velocity of a wheel is 25% less than that of a freely rolling wheel at the same vehicle speed. Diagram 6, showing a Lateral and Longitudinal Mu-Slip Curve: Freerebublic.com (2016) Hydraulic components of the ABS system include an accumulator, which is used to store the hydraulic fluid to maintain high pressure in the brake system. The antilock hydraulic control valve assembly controls the release and application of the brake system pressure to the wheel brake assemblies. The booster pump is used to provide pressurized hydraulic fluid to the ABS (Antilock braking system). The booster/master cylinder assembly is needed to modulate hydraulic pressure in the wheel circuit during the ABS operations. The fluid accumulator temporarily stores the brake fluid that is removed from the wheel brake unit during the ABS cycle. A hydraulic control unit may have one pump and one motor or it may have one motor and two pumps. The main valve is made up of a two-position valve and is opened only in the ABS mode. A modulator unit controls the flow of pressurized brake fluid to the individual wheel circuits. The solenoid valves located in the modulator unit and are electrically operated by signals from the control module. Diagram 7, typical Toyota ABS control relay wiring diagram: Wiringdiagrams21.com (2016) The electrical/electronic components consist of the following: ABS control module, which monitors the system operation and controls  the antilock function when needed. Brake pedal sensor, is the function to switch on the brake lights to alert  other vehicles that the car is slowing down and is going to stop. The wheel speed sensor, are generally used for sensing the wheel   speed. There are three different types of anti-lock braking system, firstly the four channel, four sensor ABS, this is the best scheme, there are speed sensors on all four wheels and a separate valve for all four wheels. Secondly, the three channel, three sensor ABS, this scheme is commonly found on pick-up trucks with four wheels ABS, has a speed sensor and a valve for each of the front wheels, with one valve and one sensor for both rear wheels. Thirdly, the one channel, one sensor ABS, has one valve which controls both rear wheels and one speed sensor located in the rear axle. The features and benefits of ABS system include the following: Features                                                              Benefits Control of steering.                                   Increase steering ability and                                                                  vehicle stability during                                                                  braking Fail-safe electrical/ electronic                     If the electrical/electronic  System.                                                    system fails, the ABS is shut                                                                  off. Traction control.                                        It is an optional feature that                                                                  controls excessive wheel                                                                  spin during acceleration. ABS malfunction indicator lamp.                 It informs the driver or                                                                  technician that there is ABS                                                                  fault. Diagram 8, the Operation under different conditions: Slideshare.net (2016) The design goals of the ABS system are to: Attain minimum stopping distance Maintain stability and steering ease The design solution includes the following: To develop a system that rapidly modulates the braking force under hard braking conditions to: Maintain the ideal tyre slip percentage to maximise braking force (=15%), recalling that Fbrake = Ubn. To permit the vehicle to be steered with stability maintained by preventing skidding. The automatic traction control system applies to the brakes when a drive wheel attempts to spin and lose traction. The system works best when one drive wheel is working on a good traction surface and the other is not. The system also works well when the vehicle is accelerating on slippery road surfaces especially when climbing hills. Diagram 9, A block diagram of traction: Sine.ni.com (2016) The benefits of traction control are avoiding are: It improves driver safety Less sudden twists and turns Fewer slippage of the wheels Fewer stopping distances Mostly integrated with powerful cars Better gripping of the car. The traction TCS control system is used to prevent wheel spin and loss of traction. These sorts of systems help to prevent the tyres from breaking loose during sudden acceleration on slick surfaces. They are usually an add on to the ESC electronic stability control system to control and restore traction on the slippery roads. The TCS and ABS systems share the same wheel speed sensors. The TCM program requires two additional solenoids in the hydraulic modulator assembly. The solenoids isolate the brake circuits to the drive wheels from the non-drive wheels during wheel spin. An electric pump and an accumulator are used to apply the wheel brake on the wheel that has lost its traction. The systems use an actuator to reduce power at speeds above 30 mph. This is done by closing the throttle on the vehicle with electronic throttle controls retarding the timing and decreasing fuel injector pulse width. If the ABS and traction control light illuminates continuously then the system should be scanned for codes. Most of these systems have a deactivation switch if the traction control is not required. Freeasestudyguides.com (2016) Assessment Criteria 2.3 The service and repair procedures from Land Rover Service Manual: 1. Clean the ABS sensor, smear the sensor with an anti-seize grease and    fit the sensor to the hub. 2. Fit the Allen screw securing ABS sensor and tighten to 8 Nm (6 1b.ft)    tighten to 8 Nm (6 1b.ft). 3. Secure the sensor lead to the suspension arm and suspension turret,    then connect and secure to the multi-plug. Close the cover on the    multi-plug housing. 4. Locate the wheel arch liner and secure with screws. Service and Repair: 1. Release catch and disconnect the ABS modulator multi-plug. 2. Disconnect the multi-plug from the sensor. 3. Position the cloth under modulator to absorb the fluid spillage. CAUTION: Brake fluid will damage paint finished surfaces. If spilled, immediately remove fluid and clean area with water. Ensure that the water does not enter modulator ports. 4. Noting their fitted positions, disconnect 6 brake pipe unions from the    Modulator. 5. Remove belt securing ABS modulator to mounting brake. 6. Release and remove the ABS modulator from mounting brackets to    Modulator and remove bracket. Assessment Criteria 2.4 The stability control system momentarily applies the brakes at any one wheel to correct over steer or under steer. The control unit receives signals from the typical sensors plus a yaw, lateral acceleration (G-force) and steering angle sensor. The vehicle stability control system (VSC) were created to help reduce the amount of wheel slip during acceleration and in harsh driving conditions. The way stability control system works is by having a connection between the live sensors and the anti-lock brake unit. It works by the sensors getting information and processing it through the ECU and sending it to the anti-lock brake system ABS unit. By applying hydraulic pressure through the anti-lock brake-system it may alter the traction of the wheels individually. The advantages of an integrated stability control system are: It allows the driver to maintain directional stability and control over   steering during braking. It is safe and effective. This automatically changes the brake fluid pressure at each wheel to   maintain optimum brake performance. The ABS absorbs the unwanted turbulence shock waves and modulates   the pulses thus permitting the wheel to continue turning under maximum   braking pressure. The disadvantages are: It is very costly The service and repair diagnosis is not simple Maintenance cost of a car equipped with ABS is more. Conclusion Statistics show that approximately 40% of automobile accidents are due to skidding. The problems commonly occur on vehicle with conventional brake systems which can be avoided by adding devices called ABS. If there is an ABS failure, the system will revert to normal brake operation. Normally, the ABS warning light will turn on and let the driver know there is a fault. Reference Extremetech.com (2016) Boses amazing active suspension uses speaker technology [online] Available at: http://www.extremetech.com/extreme/97177-bose-active-supension-moves-toward-market/2 [Accessed: 15th March 2016] Freeasestudyguides.com (2016) TCS Traction Control System [online] Available at: http://www.freeasestudyguides.com/tcs-traction-control-systems.html [Accessed: 15th March 2016] Hilliers (2012) Fundamentals of Motor Vehicle Technology, 6th ed. Cheltenham: London Motor-car.co.uk (2016) Mercedes-Benz Car Active Body Control (ABC) [online] Available at: http://www.motor-car.co.uk/susoension-types/item/14575-car-active-body-control [Accessed: 15th March 2016] Stoakes, Graham (2012) Principles of Light Vehicle Technology, 1st ed. Heinemann: Essex
Friday, October 25, 2019
Ben Franklin :: essays research papers
Throughout history icons emerge in each era that define that time, men who define the thinking, technology, culture, religion, and every other aspect of that time period. From the time of ancient Greece which possessed such prodigies as Socrates, and Aristotle men who were not only brilliant philosophers but also historians, mathematicians, and astronomers. To the Revolutionary period of America, which held such courageous enlightened men such as Thomas Jefferson, Thomas Paine, and Benjamin Franklin. Men who greatly helped shape America’s independence. A man who stands out among these names is â€Å" The First American†, Benjamin Franklin who goes beyond being simply an icon of America’s conquest for freedom, but is truly an American hero. Benjamin Franklin’s heroism exists in his numerous achievements in politics, his scientific inventions, and his accomplishment of truly being â€Å"The First American†. Franklin’s contributions to the world of inventions, and science prove his ideal heroism. Some of Franklin’s contributions include his improvements on Franklin’s stove, he invented the Pennsylvania fireplace, which retained and dispersed heat evenly in a room. Franklin shaped perhaps the first idea of electricity; he also helped improved city’s pavements, street lighting, sanitations, fire companies, and police. These are a small amount of Franklin’s more material accomplishments, but they are also some of his strongest. Franklin is considered an American hero because although he was a politician, he felt the need to go above and beyond his regular duties. Franklin strived for perfection and had a strong to desire to help his fellow man. Whether it was improving the quality of his community by looking at such common aspects like city pavement, or street lights, or by making a large technological breakthrough and creating something like the musical a rmonica. Although Ben Franklin’s heroism was never symbolized in any battle, it was largely seen with his constant attempts in the world of science and innovation. Benjamin Franklin used an expressed his high level of intelligence for others to learn and prosper from him. Although Franklin’s use and discoveries in science and innovation are well-rounded accomplishments, he is most credited for his actions in political office. Benjamin Franklin’s ethical right mind helped shape our nation today. Franklin believed that America had to separate itself from its control under Great Britain. Perhaps Franklin’s most heroic act is the work he contributed to help make America the free nation it is today.
Thursday, October 24, 2019
Lab 2: Microscopy and the Metric System
Microscopy and the Metric System Margaret E. Vorndam, M. S. Version 42-0090-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Exercise 1: Measuring Length, Weight, Volume, and Temperature Try the following conversions for practice. 40,000 ng =0. 24mg =0. 00024g50 cm =500 mm =0. 5m Procedure 1. Length: A metric ruler is useful for measuring items of length. The ruler below measures in mm, indicated by the small mm near 0. a. How many mm are there in 1 cm? 10, in a meter (m)? 1000 (Ruler is not to scale. See ruler in dissection kit. ) b. Locate a measurable object to use for this exercise. If the object is long, obt ain a yardstick that includes a cm scale; they can be found in local hardware stores. c. Record the length of the object below and do the conversions: Name of object: ID card . 5 cm=85mm=0. 085m Volume: Always pour an approximate volume of liquid into a clean beaker and then from the beaker into the volumetric flask or graduated cylinder. This will minimize contamination of the parent liquid source. Dispose properly of any leftover liquid. Do NOT pour it back into the original container. Why? This is so the original liquid does not get contaminated. When using a pipet or dropper to measure liquid, pour an aliquot into a clean beaker and then draw up the liquid from the beaker into the pipet. NEVER try to draw up chemicals by mouth.Why? Chemicals could go into your mouth, which is potentially dangerous and should never be done no matter if they deemed â€Å"safe†or not. Weight: Use the pen scale from the lab kit to measure out exactly three grams of sugar. Make sure to tare t he bag before adding the sugar. Why must the bag be tared before adding the sugar? This is done so the weight of the bag is not counted with the weight of the sugar. You must think about the weight of the bag when weighing out the three grams of sugar. How is the weight of the bag accounted for when the sugar is weighed?The bag is weighed first and then the 3 g of sugar is added on top of that weight so at the end the weight is more than 3g total due to the bag. Temperature: Practice converting the following with this conversion formula: 45 °F = 7. 2  °C 62 °F =16. 7  °C 98. 6 °F =37 °C Use a Celsius thermometer to measure the  °C temperature of several different aliquots of cold and warm tap water. Make sure to allow the thermometer to remain until the temperature is stable and no longer changes. Record the temperatures: Cold-15 °C Warm – 29 °C Hot- 48 °C Questions A. What laboratory equipment would be used to measure the following items? g flour| Beaker and scale| 36 mL water| Graduated cylinder| The length of a frog’s leg| ruler| 36 g water| Beaker/balance| 38? C| thermometer| Volume of a turtle*| Water displacement| 125? F| thermometer| Volume of blood| Graduated cylinder| Weight of a plant| Bag and scale| Weight of blood| Beaker and scale| Temperature of a fish’s body| thermometer| Temperature of blood| thermometer| *This answer may require some creativity. How could it be done? B. Provide the calculation steps, including the conversion factor that would be needed to convert the following measurements, and the final answers.Use U. S. and liquid units where appropriate. 248 g| = 248,000 mg| 145,000 ? L| = 145mL| 536 mL| = 536 cc| 0. 372 kg| = 372 g| 0. 75 L| = 750,000 ? L| 20. 39 cm| = . 2039 m| 145,000? L*(10^-6L /1? L)*(1000mL/1L)=145mL .372kg*(1000g/1kg)=372g 20. 39cm*(1m/100cm)=. 2039m 145,000? L*(10^-6L /1? L)*(1000mL/1L)=145mL .372kg*(1000g/1kg)=372g 20. 39cm*(1m/100cm)=. 2039m 248g*(1000mg/1g)=248,000mg 536mL *(1cc/1mL)=536cc 0. 75L*(1? L/10^-6L)=750000 ? L 248g*(1000mg/1g)=248,000mg 536mL*(1cc/1mL)=536cc 0. 75L*(1? L/10^-6L)=750000 ? L C.Provide the calculation steps, including the conversion factor that would be needed to convert the following measurements, and the final answers. Use US and liquid units where appropriate. 3 cups= . 711 L7,893 mg = . 0174 lb 2. 25 oz= 66. 53 cc36? C= 96. 8 ? F 7893mg*(1lb/453592mg)=0. 0174lb 36? C*(9/5)+32=96. 8? F (96? F-32)*(5/9)=35. 56? C 7893mg*(1lb/453592mg)=0. 0174lb 36? C*(9/5)+32=96. 8? F (96? F-32)*(5/9)=35. 56? C 3 cups*(. 237L/1cup)=. 711L 2. 25oz*(29. 57cc/1oz)=66. 53cc 145,000uL*(1tsp/4928. 92uL)= 29. 42tsp 3 cups*(. 237L/1cup)=. 711L 2. 25oz*(29. 57cc/1oz)=66. 53cc 145,000uL*(1tsp/4928. 92uL)= 29. 42tsp 45,000 uL = 29. 42 tsp96? F= 35. 56 ? C D. What advantages does the metric system have over the English method of measurement? What are the disadvantages? The metric system is advantageous because it has a base of ten, making measurements e asier to take, read, understand, and convert. The prefixes are also standard so they transfer between all measurements. Also, more countries use the metric system whereas basically only the US uses the English method. The main disadvantage of the metric system is that Americans have not grown up with these measurements so they are harder to picture and understand what distance, weight, etc. ach measurement is. For example, it is much easier for most Americans to understand the distance of a mile than to try and picture how long a kilometer is. E. Outline the steps necessary to accurately weigh 3. 5 g of starch. This depends on the scale used, but with the pen scale included in the labpaq, tare a bag or other container that can be used. Then add in the starch until the weight on the scale reads the weight of the container plus 3. 5 g. F. Outline the steps necessary to accurately pipet 5 mL of distilled water. Pour an aliquot of distilled water into a clean beaker.Put a little more th an 5mL of distilled water in a beaker. Pipet 5mL from the beaker, and check to see if the bottom of the meniscus lines up with the 5mL line. Exercise 2: Microscopy The compound light microscope effectively magnifies in the range of 40x to 2000x. If an object under view is 10 nm in length without any magnification, what will be its viewing size at 40x? 400nm at 2000x? 20 ? m What is the equivalent size at these magnifications, in inches? Show your calculations. 400nm*(1cm/10^7nm)*(1in/2. 54cm)= 1. 57*10^-5 in. 20? m*(1cm/10^4? m)*(1in/2. 54cm)= 7. 87*10^-4 in.The scanning electron microscope (SEM) employs electron bombardment to image very small specimens. Electron microscopes are used to image specimens that range from 1 nm to 100  µm in size. What is the equivalent in inches? . Show your calculations. 1nm*(1cm/10^7nm)*(1in/2. 54cm)= 3. 94*10^-8 in. 100 ? m*(1cm/10^4? m)*(1in/2. 54cm)= 0. 0039 in. Procedure 1. Parts of the Compound Light Microscope: Refer to a microscope as this s ection is read. Label the microscope diagram that follows as the examination of the microscope proceeds. a. Eyepiece (Ocular Lens): The magnification power is stamped on the outside of the lens.What is the power of the ocular lens? Microscopes may have interchangeable ocular lenses of different magnification. 15x b. Body Tube: Holds the ocular and objective lenses at the correct focal distance. c. Arm: Used to transport microscope and hold the body tube. d. Nosepiece: The revolving device that holds the objective lenses. May also be referred to as the turret. e. Objective Lenses: Consists of one or more lenses: i. The scanning power objective lens is the shortest of the lenses. What is its power? 4x ii. The low-power objective is slightly longer than the scanning objective. What is its power? 10x iii.The high-power objective is longer than the low-power objective. What is its power? 40x Label this microscope diagram with the appropriate part names and their functions: Eye piece- len s that you look through Body tube- Piece that leaves distance between lenses Course adjustment knob- adjusts focus Nosepiece- turns the lenses Objective lenses- magnify objects Stage- holds slides Mirror- reflects light so you can see what’s on the slides Base- bottom of microscope allowing stability Arm- Supports the tube and connects everything Eye piece- lens that you look through Body tube- Piece that leaves distance between lensesCourse adjustment knob- adjusts focus Nosepiece- turns the lenses Objective lenses- magnify objects Stage- holds slides Mirror- reflects light so you can see what’s on the slides Base- bottom of microscope allowing stability Arm- Supports the tube and connects everything a b c d e f g h i Parts not included in microscope are: Light source Source: Sharma, Abhishake. Labeled Microscope Drawing. N. d. Buzzle. com. 2. Focusing the Microscope: If the microscope includes an oil immersion lens, place a drop of immersion oil on the slide cover sl ip before rotating the lens into place.The function of the oil is to minimize light diffraction through the slide and subject so that greater detail can be seen. After using the oil immersion lens, clean excess oil off of the lens and the slide with a lens cloth. Never tilt a microscope when using oil or if viewing a wet slide. Why? The liquid could come off of the slide and get into a place in the microscope that isn’t good for it, and it will be messy also. 3. Operating the Microscope: a. Obtain a clean slide and cover slip from the slide box. Place the slide and cover slip separately on a paper towel or other soft surface to reduce the possibility of scratching them. . With scissors, cut a letter â€Å"e†from an old magazine or newspaper. c. Place the letter in the center of the slide. d. Follow the instructions in Section 6 below to make a wet mount of the letter. e. Following the directions outlined above under Handling and Focusing the Microscope, place the prep ared slide on the microscope stage. Leave the scanning lens in place and focus so that the letter is clearly viewable. Make drawings of the letter in the boxes below as instructed. Side of the slide furthest away from student| Look from the side of the microscope, viewand then draw the letter here, as it appears onthe slide on the stage. | e e Draw the letter here as it appears when viewing it through the microscope. | Side of the slide closest to student| f. What is observed? Microscopes invert the image on the slide. This means that the subject will appear to be 180 ° rotated and reversed from the actual image viewed on the slide. g. While viewing the letter through the lenses, move the slide slightly. What do you observe about the movement of the letter and slide when viewed through the lenses? When I move the slide up, what I’m viewing moves down. When I move the slide to the left, the image moves right. . Use the directions above to view the letter at the higher object ive powers. On the drawing made above, circle the portion of the letter that is viewable as successively higher power observations are made. What is your conclusion about what happens when higher power objectives are used? Only a piece of the top part is viewable. Higher power objectives magnify the image more. 4. Total Magnification Calculation: Typically, the ocular lens of a microscope will be 10x, but it may be higher or lower. The power is recorded on the side of the lens. a.What is the ocular lens power of the microscope that you are using? It may be 10x or 15x. Record it in Table 1. b. The objective lenses also have the magnification power recorded on their sides. What powers do the objective lenses on the microscope have? Record them in Table 1. c. Now, calculate the total magnification of the viewing area by multiplying the power of the ocular lens with that of the objective lens in use. For instance, if a microscope has a 10x magnification ocular lens and a 4x objective le ns in place for viewing, the total magnification will be 40x (10x multiplied by 4x).What other view magnifications are possible with the microscope? Calculate the total magnification for each set of lenses in Table 1. Table 1: Calculating Magnification Ocular Lens Magnification x| Objective LensesMagnification =| Total Magnification| 15x| 4x| 60x| | 10x| 150x| | 40x| 600x| 5. Diameter of Field: a. With the low-power objective in viewing position, place a short transparent metric ruler on the stage. b. While viewing the ruler through the lenses, measure the low-power diameter of field of view in mm. Convert this measurement to ? m and record in Table 2. c.Switch to the other higher power objectives, noting the diameter, in mm, for each in Table 2. Convert measurements to ? m. How might this information be useful when viewing microscopic subjects? Micrometers are smaller, so it is useful for very small objects when mm would be a very small number that wouldn’t be very understan dable. Table 2: Diameter of a Viewing Field | Magnification(ocular x objective lens’powers)| mm diameterof field of view| ? m diameter *of field of view| Scanning Lens| 60x| 2mm| 2000 ? m| Low Power Lens| 150x| 1mm| 1000 ? m| High Power Lens| 600x| Can’t tell,
Wednesday, October 23, 2019
Native Americans in the United States and Pocahontas Life Essay
This book was the bases and the most informative piece I have seen on a review of Pocahontas life in my perspective. Pocahontas life is a difficult piece of history to analysis for the fact that her life is only denoted by other persons of history writings. She has no known piece of writing of her own so all knowledge is personal based of outside parties. This makes it for sometimes difficult to truly believe everything for many of the views were from white men during a time period where they had not seen many females weren’t around. I believe the author thesis of the book for the Pocahontas part was her involvement with the English and her growth throughout her life. The other thesis of the book from the Powhatan side was there involvement with the English as well and there plan to use the culture but at the same time push them away. Within the first five chapter of Pocahontas and the Powhatan Dilemma it gives you a base review of history. This first part of the book it explains the culture of the Powhatan and how they are laid out. At this point in the book within the first chapter we find out that Pocahontas is only 9 years of age and her mother is nowhere to be found, but her father is Powhatan the chief of many native people and villages. It talks about the arrival of English in 1603 and we learn that many ships have come before us truly being to talk about John Smith and Jamestown. It also mention the arrival of Don Luis and the Spanish, but doesn’t get into much detail he just seems to pop up with the first few chapters her and there. We learn that Pocahontas name means â€Å"mischief†or the â€Å"little playful one. †The author tells us that the native were not completely different from the Europeans just simply behind the times. We also learn that within the native culture of the Powhatan that there chiefs do not come from the next up son, but from marriage of the daughters. We also learn that the Europeans felt that the women of the tribes need to be saved due to their work in the fields and other jobs around the village. It speaks of the native’s religion of their belief in spirits within everything. John Smith comes into play in 1606 when the English begin to prepare for the Virginia campaign. What I learn from John Smith was that he was a captain that has been captured a lot and has numerous stories of being saved by women that fall lustful in love with. As kids watching films and stories we are told of Pocahontas is her and John Smith fall in love, but at the time of them meeting Pocahontas would’ve been ten years of age. The plans of the English and John Smith was to: improve native culture, use the land properly, get there before the Spanish, and bring English enlighten, and a place to send the unemployed English. One of the main fears that I read about in the reading was the fear of the English to become like the Indians. The term we learned in class for this is recolonization. After the landing John Smith gets taken by the Powhatan and convince them not to kill him by way of trade. He promises them weapons which out of smarts gives them a cannon which cannot be moved. Both the native and the English realize the need of each. Without one another the English could not survive without food and the natives want weapons or easier put there technology. Over time many English were sent to live with natives to learn their culture and a native would be sent with the English. The most notable was Pocahontas herself was sent with the English to learn their language and lifestyle. The book talks of Pocahontas marriage first to a native warrior, but it fails to mention what happens to him. She later marries John Rolfe an English man who experience much of the reverse colonization. Before her marriage though Pocahontas was kidnapped one of the main characters they looked over her kidnapping was Sir Thomas Dale who was the first Marshall of Virginia. Pocahontas would declare herself a Christian in 1616 and then start her life with John. They would build a log on the land John was granted from the Virginia Company. They would have two children together in their lifetime. Shortly after being settled in there Pocahontas would go to London and experience true English culture. Pocahontas would become very ill around the time the Rolfe family was ready to head back to Virginia. Pocahontas died on March 21, 1617 in the Rolfe inn. What I learned from this book that for someone of her time period and of native culture Pocahontas got to see much more than any Native American of her time period for sure. I learned that much of what we were taught or told of her in are childhood was wrong. I learned that john smith stories could not be trusted. The feeling I receive as well is Pocahontas rejected her culture and tribe, but in return was probably rejected in a way due to her mother situation. Though she might have be royal in a way just from some of the information I read. The book was good though and I enjoyed the insist of Pocahontas life.
Tuesday, October 22, 2019
Government Intervention in the Economy essays
Government Intervention in the Economy essays In today ¡s society, many different nations will choose to answer the fundamental economic question: to what extent should the government intervene in the economy to protect the interests of society, in a variety of ways. One nation may support the system of public enterprise, placing their beliefs and values on the far left of the economic continuum; another nation may be in favour of private enterprise, placing their beliefs and values on the far right of the economic continuum. The third system is the idea of a mixed economy. A mixed economy is in the middle of the economic continuum, supporting private enterprise with some government intervention; it is a balance between public and private enterprise. The more successful way to run a country ¡s economy is to support the idea of private enterprise with some government intervention because it is more adaptable to changes in the economy and it is more stable. The two basic economic systems, public and private enterprise, are being practiced in some countries; however, the more successful and economically stable countries are those that have adapted mixed economy. Canada ¡s economic system is based on Keynes ¡s ideas about the role of government in the economy, known as mixed economy or welfare capitalism. Canada ¡s government encourages competition, profit-driven incentives, and private ownership of property, all of which are features of a private enterprise system. By doing so, producers are motivated to generate high quality goods and services, efficient and productive use of resources, and people are allowed to use their property for individual self-interests. If people are able to use these features to their advantages, then it is likely that they ¡ll be economically successful. This is a positive result because it means that the economy is growing and the total output of the economy is increasing. As for the less fortu nate, they are aided with social programs such a...
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