A 700-kg elevator starts from rest. It moves upward for 4.50 s with constant acceleration until it reaches its cruising speed of 1.75 m/s. (a) What is the average power of the elevator motor during this time interval?

A box of mass M sits on the floor of an elevator at rest. Gravity (which has a strength set by the local acceleration due to gravity g) pulls the box and the floor pushes the box. The net or total force on the box is zero.

What is the force on the box from the floor? Give both the magnitude and the direction.

Now imagine that the elevator is accelerating upwards at acceleration a. Now the two forces on the box don’t balance! Because, after all, the box is accelerating upwards. What is the force on the box from the floor in this case?

Now imagine that the elevator is accelerating downwards at accelerationa. Same question.

Now imagine that the elevator is accelerating downwards at accelerationa = g. Same question. Look up the “vomit comet” and tell me what this problem has to do with that airplane.

The speed of sound in seawater is approximately 1480 m/s. You are at a depth of 50.0m a. You ping the ocean bottom and receive the echo back 0.125 seconds later. How deep is the ocean at this point? b. If the frequency of the sound is 500.0 Hz, what is the wavelength of the sound? c. The ping coming back to the submarine has an intensity of as -80.0 dB. What is the intensity of the returning sound wave? d. Use the distance in part (b) and the answer in (c) to find the power of the reflected sound.

Tomorrow’s highest temperature can be lower than, higher than or the same as today’s highest temperature. After evaluating all the relevant information available, a weather forecaster has determined that the probability that tomorrow’s highest temperature will be higher than today’s is determined to be 65%. This is an example of using which of the following probability approach?

Select one:

A. Priori probability

B. Empirical probability

C. Subjective probability

D. Conditional probability

Because of the outbreak of the coronavirus, students of UM are allowed to opt for Pass/Fail grade for courses they enroll in the second semester of 2019/2020. An instructor of ISOM2002 believes that there will be more than 35% of the students in the course choosing this option. A random sample of 40 students of ISOM2002 reveals that 16 of them prefer to take the Pass/Fail option. At 5% level of significance, what would be the rejection rule if we want to test the instructor’s belief?

Select one:

A. Reject H₀ if t_STAT < –1.6849.

B. Reject H₀ if Z_STAT < –1.645.

C. Reject H₀ if Z_STAT > +1.645.

D. Reject H₀ if t_STAT > +1.6849.

If a coal-fired power plant burns 2 kg of coal to produce electricity, and the electricity is used to power an elevator motor that is 60% efficient, how high can the elevator and passengers be lifted up if their total mess is 1500 kg?

and then How many human workers using muscle power('energy servants") would be needed to lift the elevator up to the same height, if they had one minute to do so?

Assuming that one energy servant is 100w of energy and the coal power plant is 33% efficient. ANd 29MJ/kg in coal

A 557-N physics student stands on a bathroom scale in an 859-kg (including the student) elevator that is supported by a cable. As the elevator starts moving, the scale reads 496 N

Find the direction of the acceleration of the elevator.

What is the acceleration if the scale reads 682 N ?

If the scale reads zero, should the student worry? Explain.

Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

3800 Character(s) remaining

What is the tension in the cable in part A?

What is the tension in the cable in part D?

Assignment 1: LASA 2: Executive Presentation

PART 1: The following information is available for GFI’s maintenance cost over the last seven months. Use the high low method to estimate the fixed and variable components of its maintenance cost. Would this be an effective way to estimate these costs? Justify your answer by explaining why this is an effective way or why it is not.

PART 2: In 2001, Ms. Kelle, the head of aerobic equipment sales, started a fitness magazine called the Dancing Elephant. The magazine sells 50,000 copies a month. The total variable costs at that volume are $40,000 and fixed costs are $20,000. An additional storage cost of $2,000 will be incurred if production exceeds 55,000 units.

You have been asked to forecast the following costs for two possible production runs of (a) 52,000 units and (b) 57,000 units:

Total variable costs

Variable cost per unit

Total fixed cost

Fixed cost per unit

PART 3: GFI manufacturers ping pong tables and has a JIT policy that ending inventory must equal 10 percent of the next month’s sales. It is estimated that April’s actual ending inventory will consist of 40,000 ping pong tables. May and June sales are estimated to be 400,000 and 350,000 tables respectively. Compute the number of tables to be produced that would appear on GFI’s production budget for the month of May.

Good management includes good budgeting. Explain why the bottom-up approach to budgeting is considered a more successful management technique then a top down approach. Provide an example of implementation of the bottom-up approach to budgeting.

PART 4: Computer A has a book value of $1,500 and a current resale value of $800. The computer is needed to fulfill a client order, but if it's used on this project then its resale value will be zero. The project contract is valued at $5,000. $2,000 has already been spent on specialized software, which will be used on the project and which has no value for any other use. A printer costing $400 is needed for a separate project.

Comment on and determine the costs which are relevant to the decision regarding whether or not to commit to complete the project. Based upon the information at hand, determine whether this project is profitable. Show your calculations.

Submission:

The presentation must be submitted as a Microsoft Power Point presentation adhering to the instructions provided in the opening paragraph.

Which type of coverage has the highest number of enrollees in US

Create a program that determines the name of the person with the highest or lowest number of votes. The data will be in two arrays. The first array is of type String and has the following names in it: Mike Muldune Justin Meiber Clark Kent Ana Karina The second array is of type integer and has the following numbers in it: 2324, 2425, 3344 and 2526. Ask the user to enter a 1 for highest and 2 for lowest. If the user enters a 1, print the name of the person with the highest number of votes and the number of votes received. It the user enters a 2, print the name of the person with the lowest number of votes and the number of votes received.