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17 August, 11:25

As a result of the Law of Conservation of Energy, a fish cannot gain more energy than it consumes. An isolated system consisting of an aquarium, a large fish, and fish food is set up. Which of the following methods would best demonstrate the Law of Conservation of Energy?

A. Measure the mass and temperature of the water. Then feed the fish and compare the growth of the fish to the change in temperature.

B. Measure the total energy including the temperature of the water, fish, and food. Then measure the total energy again after the fish eats, and determine the difference.

C. Measure the mass of the fish before and after it eats. Add the mass of the food.

D. Change the isolated system to open, so that energy can move out of it. Then measure the amount of energy that leaves.

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  1. 17 August, 11:31
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    I think The best way to test this hypothesis would be to measure the total energy of the aquarium before feeding and the energy of the food fed to the fish. Then measure the energy in the aquarium after feeding and determine the difference.
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