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Question
A large balloon used to sample the upper atmosphere is filled with 660 m3 of hydrogen. What is the mass of the hydrogen (in kg)?
Question
A large truck tire is inflated to a gauge pressure of 52 psi. The total area of one sidewall of the tire is 1,280 in2. What is the net outward force (in lb) on the sidewall because of the air pressure? (Enter the magnitude.)
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A bicycle tire pump has a piston with area 0.35 in2. If a person exerts a force of 21 lb on the piston while inflating a tire, what pressure does this produce on the air in the pump?
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A 2,900-kg truck runs into the rear of a 1,000-kg car that was stationary. The truck and car are locked together after the collision and move with speed 2 m/s. Compute how much kinetic energy was “lost” in this inelastic collision.
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