A motorboat heads due east at 11.00 ms across a river that, Ask an Expert

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Q. A motorboat heads due east at 11.00 m/s across a river that flows toward the south at a speed of 3.40 m/s. What is the resultant velocity relative to an observer on the shore? If the river is 1360m wide, how long does take the boat to cross?

Q. A movable piston having a mass of 8-kg and a cross-sectional area of 5.0cm2 traps 0.440 moles of an ideal gas in a vertical cylinder. If the piston slides without friction in the cylinder, how much work is done on the gas while its temperature is increased from 16°C to 291°C?

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