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During compression of a spring the work done

Question:

During compression of a spring the work done is $10 \mathrm{~kJ}$ and $2 \mathrm{~kJ}$ escaped to the surroundings as heat. The change in internal energy, $\Delta \mathrm{U}($ inkJ) is:

  1. 8

  2. 12

  3. $-12$

  4. $-8$


Correct Option: 1

Solution:

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