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You are an engineer in charge of designing a new generation of elevators for a prospective upgrade to the Empire State Building. Before the state legislature votes on funding for the project, they would like you to prepare a report on the benefits of upgrading the elevators. One of the numbers that they have requested is the time it will take the elevator to go from the ground floor to the 102nd floor observatory. They are unlikely to approve the project unless the new elevators make the trip much faster than the old elevators. If state law mandates that elevators cannot accelerate at greater than 4.80 m/s2 or travel faster than 18.3 m/s, what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor?
The rate of rotation of the smooth-walled tub is chosen so that a small piece of cloth will lose contact with the tub when the cloth is at an angle of ? = 73.0° above the horizontal. If the radius of the tub is r = 0.455 m, what rate of revolution..
A diver releases an air bubble of volume 2.2 cm3 from the depth of 10 m below the surface of a lake, where the temperature is 7°C. What is the volume of bubble when it reaches just below the surface of the lake, where temperature is 25°C.
High-speed stroboscopic photographs show that the head of a 280-g golf club is travelling at 58 m/s just before it strikes a 46-g golf ball at rest on a tee. After the impact, the club head travels (in the similar direction) at 52-m/s. determine t..
What travel time is required for the landing
You want to take a bath with the water temperature at 35°C. The water temperature is 38°C from the hot water tap and 11°C from the cold water tap. You fill tub with a total of 191kg of water. How many kilograms of water from the hot water tap do y..
if the barge can only be pushed 20-cm deeper into the water before water overflows to sink it, how various 400-kg horses can it carry.
Suppose an ideal gas is in a container 3L in volume and allowed to expand by having a piston move. The final volume after the piston moves is 15L. If the gas is at first at a pressure of 1×10^5 Pa and a temperature of 300 K, and temperature is mai..
Two wires are parallel and one is directly above the other. Each has a length of 50.0 m and a mass per unit length of 0.020 kg/m. However, the tension in the wire A is 6.20 102 N, and the tension in the wire B is 2.90 102 N.
A rigid tank contains 1.40 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.2 atm to 5.90 atm. Assume the volume of the tank and the temperature of the gas re..
why is it advisable to make use of a proper restraining seat rather than hold a child on your lap.
What is the time of oscillation of block
A monatomic ideal gas is held in a thermally insulated container with a volume of 0.0850m^3 . The pressure of the gas is 105kPa , and its temperature is 357K a)To what volume must the gas be compressed to increase its pressure to 150kPa b)At what ..
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