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A 7.80-g bullet moving at 500 m/s penetrates a tree trunk to a depth of 6.00 cm.
(a) Use work and energy considerations to find the average frictional force that stops the bullet.
N
(b) Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.
s
A hot-air balloon has just lifted off and is rising at the constant rate of 2.2 m/s. how high is she when the camera reaches her
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How much energy is stored by the electric field between two square plates, 6.0cm on a side, separated by a 1.0mm air gap
A cowboy at a dude ranch fills a horse trough that is 1.50m long, 65cm wide and 45cm deep. He uses a 2cm diameter hose from which water emerges at 1.50m/s.
Mason's net income (pre-bonus) is expected to be $3,000,000, and bonus expense is deducted in computing net income. Illustrate what is the amount that needs to be recorded for estimated bonus liability for 2010?
Two metal balls are hung from strings. The first ball, 0.14 kg, is pulled to the side and released so that it strikes the second ball with a speed of 1 m/s. What is the mass of the second ball
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