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The cable lifting an elevator is wrapped around a 1.0--diameter cylinder that is turned by the elevator's motor. The elevator is moving upward at a speed of 1.5 . It then slows to a stop, while the cylinder turns one complete revolution. How long does it take for the elevator to stop?
Mabel walks down a straight hall from a bench to the door of her spanish class at a rate of 1.4m/s for 28 s, then she realizes she forgot her folder. Compute Mabel's average speed
An electric field of 254,000 N/C points due west at the certain spot. What are the magnitude and direction of the force that acts on the charge of -8.1 µC at this spot.
A) Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal? B) Which is more useful for storing heat, this metal or an equal weight of water? defin..
The speed of light in a certain medium is 2.2E10^8 m/s. What is the index of refraction of this medium
How far would trampoline stretch if the performer stands still on it while taking a bow.
q1. a rifle fires a 2.39 10-2-kg pellet straight upward since the pellet rests on a compressed spring that is released
A well insulated rigid vessel also contains 3 kg of saturated liquid water at 40 oC. The vessel also contains an electrical resistor that draws 10 amperes when 50 volts are applied.
A spring stretches by 0.0157 m when a 3.22-kg object is suspended from its end. How much mass should be attached to this spring
A rock is thrown horizontally with a speed of 19 m/s from a vertical cliff of height 30 m. How far will it land from the base of the cliff
A boat is heading upstream when a float is dropped overboard and carried downstream. What is the boats speed in still water
The work function of a particular substance is 4.15 × 10-19 J. What is the photoelectric cutoff wavelength for this material
A flight attendant pulls her 75 N flight bag a distance of 305 m along a level airport floor at a constant velocity. Find the work done by the force of friction on the flight bag
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