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    Physics
    Grade-9
    Easy

    Question

    A hot reservoir is touched to a system, which of the following may happen?

    1. The heat flows from the system to the reservoir
    2. The internal energy of the system decreases
    3. None of the above
    4. All of the above

    Hint:

    Apply law of thermodynamics.

    The correct answer is: None of the above

      In simple words, the first law of thermodynamics states that whenever heat energy is added to a system from outside, some of that energy stays in the system and the rest gets consumed in the form of work. Energy that stays in the system increases the internal energy of the system.

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