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After falling from rest from a height of 30m, a 0.53 kg ballrebounds upward, reaching a height of 20m. If the contactbetween ball and ground lasted 2.1 ms, what average force wasexerted on the ball?
A woman stands on the edge of a cliff and throws a stone vertically downward with an initial speed of 10 m/s. the instant before the stone hits the ground below, it has 450 j of kinetic energy. if she were to throw the stone horizontally outward from..
Humid air breaks down in a sufficiently strong electric field, What is the magnitude of the electrostatic force for an electron and for an ion with a single electron missing
A compact car has a mass of 1170kg. What will be the car's oscillation frequency while carrying four 84.0kg passengers
Two bricks are adjacent, and a third brick is positioned symetrically above them. Where is the center of mass of the three bricks
A combination mercury- steam turbine takes saturated mercury vapor a boiler at 500 C and exhausts to steam boiler at 240 C. what is the ideal efficancy of this combination
A solid uniform 38.9kg ball of diameter 36.2cm is supported against a vertical frictionless wall using a thin 30.0cm wire of negligible mass. how hard does the ball push against the wall
A 02385 mH inductor has a length that is four times its diameter. If it is wound iwth 10.3 cm^-1 truns per centimeter, what is the length? Answer in units of m.
A window in a house is rectangular, with height 49 cm and width 29 cm. What is the force on the window
Light of wavelength 624 nm passes through a single slit and then strikes a screen that is 1.2 m from the slit. What is the width of the slit
a 1.000 meter long rod (measured when stationary) is moving at 0.8 c. How long would the rod appear to a stationary observer
An organ pipe is shown to resonate at 240 Hz, 320 Hz, and 400 Hz. It does not resonate at any other frequencies between 240 Hz and 400 Hz, How long is the organ pipe
Doug uses a 29 horizontal force to push a 3.5 crate up a 1.5 -high, 20 frictionless slope. What is the speed of the crate at the top of the slope
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