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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?
A 32.8 g piece of aluminium at 72 is dropped into a cavity in an extremely large block of ice at 0. How much ice mice does aluminium piece melt.
The rocket's speed was measured to be 1.49 c. The rocket's rest length is 380m. An observer flying through measured the rocket to be 199m long.
A vertical scale on a spring balance reads from 0 to 245 rm{N}. The scale has the length of 11.0 rm{cm} from the 0 to 245 rm{N} reading. A fish hanging from bottom of the spring oscillates vertically at a frequency of 3.00 rm{Hz}.Ignoring the mass..
A 12cm tall robin sits in a tree 1.500 m above a shiny lawn sphere with a diameter of 48.00 cm. How tall does the image of the robin appear as he sees his reflection? Use a ray diagram and the equations to locate and completely describe the image.
A horse canters away from its trainer in a straight line, moving 140m away in 18s. It then turns abruptly and gallops halfway back in 4.9s.
Charges q and Q are placed on the x axis at x = 0 and x = 2.0 m, respectively. If q = -40 pC and Q = +30 pC, define the net flux through a spherical surface (radius = 1.0 m) centered on the origin.
A model rocket rises with constant acceleration to the height of 3.7, at which point its speed is 25. what was the magnitude of the rocket's acceleration.
Assume that plane continues to fly with the similar velocity
At 18°C, a rod is exactly 20 cm long on a steel ruler. Both the rod and the ruler are placed in an oven at 285°C, where the rod now measures 20.21 cm on the same ruler. What is the coefficient of linear expansion for the material of which the rod ..
An oscillator with a mass of 420 g and a period of 0.900 s has an amplitude that decreases by 1.90 percent during each complete oscillation.
(a) How much charge can be placed on a capacitor with air between the plates before it breaks down if the area of each plate is 6.00 cm2? (b) Find the maximum charge if bakelite is used between the plates instead of air.
A car of mass = 1400 travelling at 60.0 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and the car's tires. Use = 9.80 throughout this problem.
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