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Q. The specific heat of ethanol is 2.44 J/g·°C. How many kilojoules of energy are required to heat 50.0 g of ethanol from -20.0°C to 68.0°C?

Q. A train is traveling up a 3.73 degree incline at a speed of 3.25m/s when the last car breaks free and begins to coast without friction. a) How long does it take for the last car to to come to rest momentarily? b) How far did the last car travel before momentarily coming to rest?

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