Answer:
1) 100%
2) Lose.
3) Entropy.
The second law of thermodynamics states that no process is 100% efficient. Thus, every system in the universe has a specific amount of energy in it. As the system functions, it will lose energy and gain entropy.
Explanation:
The second law of thermodynamics, also known as the entropy law or heat engine law, states that the total entropy of an isolated system can never decrease over time. It either increases (for irreversible processes, that is, most real life processes) or it remains constant (for reversible processes).
This translates to an expected loss of energy for any real life process thereby making it impossible for any process to be 100% efficient. This all then leads to entropy increase (a gain of entropy).
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