Questions
What is the percentage error on each of the velocities in your experiment? Discuss with your members what could have caused this error.

 

OBJECTIVES:

  1. To determine the potential and kinetic energy of a freely falling body
  2. To determine the loss in kinetic energy of an inelastic collision
  3. To calculate the percentage error of the experimental error of the velocity of a freely falling body using the conservation of mechanical energy of a body

MATERIALS:

  1. Tennis balls
  2. Digital Timer
  3. Meter stick                                                           

THEORY

  1. Conservation of Mechanical Energy
  • A body raised to a certain height possesses potential energy due to its position. Since work was done to lift the body to a certain height, the body gains potential energy. When the body is released from its position, the potential energy is transformed into kinetic energy on its way down. Upon reaching the ground, the potential energy is converted into kinetic energy. Ideally, if there is no loss in kinetic energy, the body should bounce back to its original height. This only happens for a perfectly elastic collision
  1. Inelastic Collision
  • In most situations however, once the body reaches the ground, some of its kinetic energy is lost (e.g., the body undergoes slight deformation upon collision with the ground). The body will then reach a lower maximum height than the original height from which it was dropped. Eventually, the body will lose all its kinetic energy and will rest on the ground once all of its kinetic energy is lost. In this case, the collision is inelastic; that is, kinetic energy is not conserved.

Procedural Instructions:

  1. Decide as a group the original height from which the ball will be dropped. Record this in your data table. After the ball bounces up twice, record also the maximum height reached by the ball for each bounce. Assign one member to note these two maximum heights.
  2. Assign three members to record the time for the ball to reach the ground from its original height, first maximum height, and second maximum height. Note that three members would be needed to measure these different times. Record these in your data table.
  3. Complete your data table to find for the velocity of the ball each time it reaches the ground. You are responsible for the equation that should be used. Using the times and the corresponding heights you have recorded, discuss as a group the appropriate formula to be used and apply them. Record your results in your data table.
  4. Using your equations for kinetic and potential energies, again, discuss as a group the appropriate formula for determining the theoretical value of each velocity you have computed and apply it. Record your results in your data table.
  5. Compute for the percentage error for each velocity.

QUESTIONS AND PROBLEMS

  1. What is the percentage error on each of the velocities in your experiment? Discuss with your members what could have caused this error.
  2. How is the loss in the kinetic energy manifested by the ball each time it reaches the ground?
  3. In your experiment, calculate the kinetic and potential energies when the ball was on its midway down the first, the second, and the third time. What can you conclude about the total mechanical energy of the ball as its falls down the ground?

DATA TABLE

h1=10m,h2=5,h3=0

Initial Max Height

Second Max Height

Third Max Height

Potential Energy          (from Max Height)

200t 100t 0

Kinetic Energy               (upon reaching ground)

0 1wj 2wj

Time

1sec 1sec 1sec

Experimental Velocity

0 5.1 9.9

Theoretical Velocity

0 5 10

Percent Error0,2,1

In: Physics

can you do the experriment and answer 3 questions i will be grateful this is the...

can you do the experriment and answer 3 questions i will be grateful

this is the third time i post this question i would like to to tell me what to write exactly in the table. then answer the 3 questions

thank you

OBJECTIVES:

  1. To determine the potential and kinetic energy of a freely falling body
  2. To determine the loss in kinetic energy of an inelastic collision
  3. To calculate the percentage error of the experimental error of the velocity of a freely falling body using the conservation of mechanical energy of a body

MATERIALS:

  1. Tennis balls
  2. Digital Timer
  3. Meter stick                                                           

THEORY

  1. Conservation of Mechanical Energy
  • A body raised to a certain height possesses potential energy due to its position. Since work was done to lift the body to a certain height, the body gains potential energy. When the body is released from its position, the potential energy is transformed into kinetic energy on its way down. Upon reaching the ground, the potential energy is converted into kinetic energy. Ideally, if there is no loss in kinetic energy, the body should bounce back to its original height. This only happens for a perfectly elastic collision
  1. Inelastic Collision
  • In most situations however, once the body reaches the ground, some of its kinetic energy is lost (e.g., the body undergoes slight deformation upon collision with the ground). The body will then reach a lower maximum height than the original height from which it was dropped. Eventually, the body will lose all its kinetic energy and will rest on the ground once all of its kinetic energy is lost. In this case, the collision is inelastic; that is, kinetic energy is not conserved.

Procedural Instructions:

  1. Decide as a group the original height from which the ball will be dropped. Record this in your data table. After the ball bounces up twice, record also the maximum height reached by the ball for each bounce. Assign one member to note these two maximum heights.
  2. Assign three members to record the time for the ball to reach the ground from its original height, first maximum height, and second maximum height. Note that three members would be needed to measure these different times. Record these in your data table.
  3. Complete your data table to find for the velocity of the ball each time it reaches the ground. You are responsible for the equation that should be used. Using the times and the corresponding heights you have recorded, discuss as a group the appropriate formula to be used and apply them. Record your results in your data table.
  4. Using your equations for kinetic and potential energies, again, discuss as a group the appropriate formula for determining the theoretical value of each velocity you have computed and apply it. Record your results in your data table.
  5. Compute for the percentage error for each velocity.

QUESTIONS AND PROBLEMS

  1. What is the percentage error on each of the velocities in your experiment? Discuss with your members what could have caused this error.
  2. How is the loss in the kinetic energy manifested by the ball each time it reaches the ground?
  3. In your experiment, calculate the kinetic and potential energies when the ball was on its midway down the first, the second, and the third time. What can you conclude about the total mechanical energy of the ball as its falls down the ground?

DATA TABLE

Initial Max Height

Second Max Height

Third Max Height

Potential Energy          (from Max Height)

Kinetic Energy               (upon reaching ground)

Time

Experimental Velocity

Theoretical Velocity

Percent Error

In: Physics

Write down the equation for GDP based on the national spending approach and answer the following...

Write down the equation for GDP based on the national spending approach and answer the following questions.

- Does reducing imports increase GDP? Why?

- Does an increase in unemployment benefits increase the government spending component? Why?

- Does the component associated with investment include the purchase of stocks and bonds? Why?

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In an examination of holiday spending (known to be normally distributed) of a sample of 16 holiday shoppers at a local mall, an average of $54 was spent per hour of shopping. Based on the current sample, the standard deviation is equal to $21. Find a 90% confidence interval for the population mean level of spending per hour.

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1) A decline in the interest rate is likely to have no effect on GDP? Agree or disagree? Why?

2) Households tend to increase their spending during a recession because they realize that more spending will cause firms to hire more workers and the problem of unemployment will be solved.” Do you agree or disagree? Explain.

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Research the concepts of government spending, taxation, and borrowing. Be sure to provide details to support your work. What are the sources of federal taxes? What are the areas of government spending? Were you surprised about anything you found in your research? If so why?

Be sure to cite your sources.

In: Economics

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Monetary policy refers to Federal Reserve actions to influence the money supply and economic conditions. Fiscal policy is spending and taxing by the government, which can also affect economic conditions. Describe how changes in spending and taxes can affect economic activities. (typing please,thank you.)

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Electro Motors (Electro) is considering a new project to produce electric vehicles for the Australian domestic...

Electro Motors (Electro) is considering a new project to produce electric vehicles for the

Australian domestic market and international markets. It has identified a property/plant that was formerly used to build petrol fuelled motor vehicles that could be refitted at minimal cost to manufacture the new electric vehicles. Electro is targeting Australian metropolitan centres for initial sales and expanding into regional centres over the next five years. International demand for electric vehicles is being driven by China and Electro has been in negotiation to provide vehicles to the Chinese market in 2025.

Electro has made the following projections:

  • In the first year 2,000 units will be sold and growing at 10% pa.
  • The price for each unit in the first year will be AU$50,000. This price will increase by 5% pa.
  • Variable costs are 70% of the sales price in the first year’s total revenue and grow by 8% each year.
  • Fixed costs are $5 million pa, which are expected to grow by 4% each year.
  • The project is for a term of 5 years. The projected growth of the electric cars line is expected to outgrow the plant at this time, hence the plant will be sold at the end of 5 years.
  • Initial investment into manufacturing equipment will be $100 million.
  • The equipment may be depreciated at 20% straight-line (prime cost) method to zero.
  • In 5 years, the plant will be worth 10% of the purchase price.
  • Working capital will be $3 million.
  • Electro's required rate of return is 10%.
  • The tax rate for Electro is 30%.
  • Required payback is three (3) years.

Question 1. You have been asked to provide a further evaluation regarding the alternative use of the plant for the purpose of manufacturing electric self-driving cars, however the project life will be for 10 years. Explain how financial managers may evaluate both projects that are of unequal lives. (Only Explain theoretically with illustration whenever possible)

In: Finance

Electro Motors (Electro) is considering a new project to produce electric vehicles for the Australian domestic...

Electro Motors (Electro) is considering a new project to produce electric vehicles for the

Australian domestic market and international markets. It has identified a property/plant that was formerly used to build petrol fuelled motor vehicles that could be refitted at minimal cost to manufacture the new electric vehicles. Electro is targeting Australian metropolitan centres for initial sales and expanding into regional centres over the next five years. International demand for electric vehicles is being driven by China and Electro has been in negotiation to provide vehicles to the Chinese market in 2025.

Electro has made the following projections:

  • In the first year 2,000 units will be sold and growing at 10% pa.
  • The price for each unit in the first year will be AU$50,000. This price will increase by 5% pa.
  • Variable costs are 70% of the sales price in the first year’s total revenue and grow by 8% each year.
  • Fixed costs are $5 million pa, which are expected to grow by 4% each year.
  • The project is for a term of 5 years. The projected growth of the electric cars line is expected to outgrow the plant at this time, hence the plant will be sold at the end of 5 years.
  • Initial investment into manufacturing equipment will be $100 million.
  • The equipment may be depreciated at 20% straight-line (prime cost) method to zero.
  • In 5 years, the plant will be worth 10% of the purchase price.
  • Working capital will be $3 million.
  • Electro's required rate of return is 10%.
  • The tax rate for Electro is 30%.
  • Required payback is three (3) years.

Question 1. You have been asked to provide a further evaluation regarding the alternative use of the plant for the purpose of manufacturing electric self-driving cars, however the project life will be for 10 years. Explain how financial managers may evaluate both projects that are of unequal lives. Also calculate Electro's each year's depreciation until Year 5.

In: Finance

Andrea would like to organize SHO as either an LLC (taxed as a sole proprietorship) or...

Andrea would like to organize SHO as either an LLC (taxed as a sole proprietorship) or a C corporation. In either form, the entity is expected to generate an 8 percent annual before-tax return on a $800,000 investment. Andrea’s marginal income tax rate is 35 percent and her tax rate on dividends and capital gains is 15 percent. Andrea will also pay a 3.8 percent net investment income tax on dividends and capital gains she recognizes. If Andrea organizes SHO as an LLC, Andrea will be required to pay an additional 2.9 percent for self-employment tax and an additional 0.9 percent for the additional Medicare tax. Further, she is eligible to claim the deduction for qualified business income. Assume that SHO will pay out all of its after-tax earnings every year as a dividend if it is formed as a C corporation.

Problem 4-48 Part a (Algo)

a. How much cash after taxes would Andrea receive from her investment in the first year if SHO is organized as either an LLC or a C corporation? (Round intermediate calculations and your final answers to the nearest whole dollar.)

LLC= ?

C corporation= ?

b. What is the overall tax rate on SHO’s income in the first year if SHO is organized as an LLC or as a C corporation? (Round intermediate calculations to the nearest whole dollar. Round your final answers to 2 decimal places.)

LLC= ___%

C corporation=___%

In: Accounting