Question

the sum of the kinetic energy and the heat energy
eventually decreases and disappears
increases the more your rub your hands
remains the same
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Explanation:

This question relates to the law of conservation of energy. When rubbing hands, mechanical (kinetic) energy is converted to heat energy, but the total energy (sum of kinetic and heat) should remain constant as energy is conserved, not created or destroyed. The first option is wrong as energy doesn't disappear. The second is wrong because the sum isn't increasing (it's a conversion, not addition of new energy). The third option aligns with energy conservation.

Answer:

The option "Remains the same" (the third checkbox option)