1. What is better to warm up in a cold night a kg of hot water at 50C or a kg of gold at the same temperature? Why?

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1. What is better to warm up in a cold night a kg of hot water at 50C or a kg of gold at the same temperature? Why?

2. What is happening with the parameters (pressure, volume, and temperature) of an air bubble released by a frog at the bottom of a lake? Explain why.

Please explain in detail.

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