Joule Meter Principle Experiment (3D Experimental Animation)
In 1847, Joule designed a more ingenious experiment by placing water in a calorimeter, installing a rotating shaft with blades in the middle, and then letting a descending weight drive the blades to rotate. Due to the friction between the blades and water, both the water and the calorimeter heated up. Based on the height of the heavy object falling, the converted mechanical work can be calculated; Based on the temperature rise of water in the calorimeter, the increase in internal energy of water can be calculated. By comparing two numbers, the accurate value of thermal energy equivalent can be obtained.
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