Power output of the speaker
What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air?
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The lead increases by an amount change of temperature. For an individual bullet hitting the plate with twice the speed, what is the best estimate of the temperature increase?
A falling skydiver has a mass of 54.5 kg. What is the magnitude of the skydiver's acceleration when the upward force of air resistance has a magnitude that is equal to one-fourth of his weight?
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A 1.00 kg ball strikes a wall with a velocity of 8.0 m/s to the left. The ball bounces off with a velocity of 3.5 m/s to the right. If the ball is in contact with the wall for 0.25 s, what is the constant force exerted on the ball by the wall?
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