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A sledge loaded with bricks has a total mass of 19.0kg and is pulled at constant speed by a rope inclined at 20.4 degrees above the horizontal. The sledge moves a distance of 19.2m on a horizontal surface. The coefficient of kinetic friction between the sledge and the surface is 0.500.
a) What is the tension in the rope?
b) How much work is done by the rope on the sledge?
c) What is the mechanical energy lost due to friction?
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An ideal gas at STP, originally occupying a volume of 0.115 m^3, expands isothermally until its pressure falls to 0.85 atm. How much heat flows into the gas
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