Homework Help: Physics

Posted by Alex on Tuesday, April 17, 2012 at 3:40pm.

James Joule once attempted to measure the increase in temperature of the water in a waterfall resulting from its decrease in gravitational potential energy. How high would the waterfall have to be for the temperature at the bottom to be 1°C higher than at the top?

Physics - Devyn, Wednesday, November 14, 2012 at 7:18pm
Well hey there. Using the equation for potential energy: mass x gravity x height and the knowledge that it takes 1 calorie (4.186 Joules) to raise the temperature of one gram of water 1 degree Celsius we can solve for the height.

(0.001 kg) x (9.8 m/s^2) x (h) = 4.186 J

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