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A 45.0 kilogram girl is standing on a 150 kilogram plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.50 m/s to the right relative to the plank.
a) Find her velocity relative to the surface of the ice?
b) Obtain the velocity of the plank relative to the surface of the ice?
question a football is inflated to a pressure of 1.00 x 103 torr in a room at 25 degrees c. if the game is played at 10
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A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation I = (0.884 A) sin [(333 Hz)t]. What is the average power delivered to the light bulb
A 4-kg ball traveling to the right with a speed of 4 m/s collides witha 5-kg ball traveling to the left with a speed of 2 m/s. What is the total momentum of the two balls before they collide
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