The Executive summary is a written version of what is known as an
“elevator pitch”. Imagine yourself on an elevator with a potential
lender or investor. Only the two of you are on the elevator, and you
have that person’s undivided attention for the duration of the ride,
but the building is not very tall! Explain the five-part framework that
you would use to convince the investor that your business is a great
investment

A large fish hangs from a spring balance supported from the roof of an elevator.

Part A

If the elevator has an upward acceleration of 2.90m/s2 and the balance reads 50.0N , what is the true weight of the fish?

Part B

Under what circumstances will the balance read 32.0N ?

Part C

What will the balance read if the elevator cable breaks?

A 72 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.73 s. It travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.2 s, and comes to rest. What does the spring scale register in each of the following time intervals?

(a) before the elevator starts to move
_____ N
(b) during the first 0.73 s
_____N
(c) while the elevator is traveling at constant speed
_____N
(d) during the negative acceleration
_____N

Beryl (m=45kg) is standing in an elevator that is moving vertically upward at a speed of 3 m/s. 1.5 s later, the elevator and Beryl are moving vertically downward at a speed of 5 m/s. Beryl's feet remain in contact with the elevator's floor at all times, and that is Beryl's only point of contact with the elevator. (The y axis is vertical and positive upward)

What is the y-component of Bery;'s acceleration during that time interval?

What is the magnitude of Beryl's weight?

What is the magnitude of the normal force that the elevator exerts on Beryl during that time interval?

In the worst-case scenario, you've got an elevator with a mass 2420 kg moving a speed 4.29 m/s when it reaches the bottom of the shaft. Your first idea is to put a spring, with spring constant 1.068×10⁴ N/m, at the bottom of the shaft.

a)Assuming the spring obeys Hooke's Law perfectly, how far will it compress to stop the elevator?

b)When the elevator comes to a stop with the spring compressed, what is the net force on the elevator?

c)It's a bit unreasonable to put a spring large enough to compresses this far under every elevator. So you decide to add a clamping mechanism to the walls around the spring, which will provide a friction force of magnitude 1.74×10⁴ N

Now how far does the spring get compressed?

Express your answer with appropriate units.

Last year (2016), Richter Condos installed a mechanized elevator for its tenants. The owner of the company, Ron Richter, recently returned from an industry equipment exhibition where he watched a computerized elevator demonstrated. He was impressed with the elevator's speed, comfort of ride, and cost efficiency. Upon returning from the exhibition, he asked his purchasing agent to collect price and operating cost data on the new elevator. In addition, he asked the company’s accountant to provide him with cost data on the company’s elevator. This information is presented below. Old Elevator New Elevator Purchase price $104,500 $161,000 Estimated salvage value 0 0 Estimated useful life 5 years 4 years Depreciation method Straight-line Straight-line Annual operating costs other than depreciation: Variable $35,600 $11,000 Fixed 23,200 9,000 Annual revenues are $239,000, and selling and administrative expenses are $29,000, regardless of which elevator is used. If the old elevator is replaced now, at the beginning of 2017, Richter Condos will be able to sell it for $24,700. Collapse question part (a) Determine any gain or loss if the old elevator is replaced. Gain on saleLoss on sale $ Click if you would like to Show Work for this question: Open Show Work Link to Text Attempts: 0 of 15 used Save for later Submit Answer Expand question part (b) The parts of this question must be completed in order. This part will be available when you complete the part above. Expand question part (c) The parts of this question must be completed in order. This part will be available when you complete the part above.

Part A:

A certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. The initial volume was 3.00 L and the initial pressure of chlorine was 1.80 atm . The piston was pushed down to change the volume to 1.00 L. Calculate the final pressure of the gas if the temperature and number of moles of chlorine remain constant..

Express your answer numerically in atmospheres.

Part B:

In an air-conditioned room at 19.0 ∘C, a spherical balloon had the diameter of 50.0 cm. When taken outside on a hot summer day, the balloon expanded to 51.0 cm in diameter. What was the temperature outside? Assume that the balloon is a perfect sphere and that the pressure and number of moles of air molecules remains the same.

Express your answer numerically in degrees Celsius.

Part C:

A cylinder with a movable piston contains 2.00 g of helium, He, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume was changed from 2.00 L to 3.70 L ? (The temperature was held constant.)

Express your answer numerically in grams.

One kilogram of water is contained in a piston-cylinder device at 100 degC. The piston rests on lower stops such that the volume occupied by the water is 0.835 m3. The cylinder is fitted with an upper set of stops. When the piston rests against the upper stops, the volume enclosed by the piston-cylinder device is 0.841 m3. A pressure of 200 kPa is required to support the piston. Heat is added to the water until the water exists as a saturated vapor. Find the final specific volume (v4 = vg). Please show steps for interpolation.

Andy is always looking for ways to make money fast. Lately, he has been trying to make money by gambling. Here is the game he is considering playing: The game costs 2 dollars to play. He draws a card from a deck. If he gets a number card (2-10), he wins nothing. For any face card (jack, queen or king), he wins 3 dollars. For any ace, he wins 5 dollars and he wins an extra $20 if he draws the ace of clubs.

a) if x = money gained, write down the pmf for this game.

b) What are the E(X) and V(X)?

C) Find and sketch the cdf, F(x)

Suppose that 132 moles of a monatomic ideal gas is initially contained in a piston with a volume of 0.94 m³at a temperature of 348 K. The piston is connected to a hot reservoir with a temperature of 1064 K and a cold reservoir with a temperature of 348 K. The gas undergoes a quasi-static Stirling cycle with the following steps:

1. The temperature of the gas is increased to 1064 K while maintaining a constant volume.
2. The volume of the gas is increased to 3.38 m³ while maintaining a constant temperature.
3. The temperature of the gas is decreased to 348 K while maintaining a constant volume.
4. The volume of the gas is decreased to 0.94 m³ while maintaining a constant temperature.

It may help you to recall that CV = 12.47 J/K/mole for a monatomic ideal gas, and that the number of gas molecules is equal to Avagadros number (6.022