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A group of students performed an experiment to prove the law of conservation of energy. In the experiment, a flask containing water at room temperature was shaken vigorously for a few minutes. The table shows a partial record of the temperature of the water before and after shaking.
Experimental Record
Temperature
Before Shaking 21 °C
After Shaking Unknown
What best predicts the unknown temperature?
Group of answer choices
A. Less than 21 °C because heat energy is formed from the energy used in shaking
B. Greater than 21 °C because heat energy is formed from the energy used in shaking
C. Less than 21 °C, because the total energy of the system after shaking is higher than before shaking
D. Greater than 21 °C, because the total energy of the system after shaking is higher than before shaking
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