A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp that is inclined at an angle of 17.0° above the horizontal. The semi-trailer coasts to a stop after traveling 120 m along the ramp. What was the truck's initial speed? Neglect air resistance and friction.
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If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?
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A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls...
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