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16 February, 11:05

Which of the following statement (s) about energy and phase is/are correct? Select all that apply. Choose one or more: A. While only one phase is present, adding or removing energy changes PE but not KE. B. While only one phase is present, adding or removing energy changes KE but not PE. C. During a phase change, adding or removing energy changes KE but not PE. D. During a phase change, adding or removing energy changes PE but not KE.

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  1. 16 February, 11:17
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    Answer: Option (A) and (D) are the correct statements.

    Explanation:

    Potential energy is defined as the energy obtained by an object due to its position. Whereas kinetic energy is defined as the energy obtained by an object due to the motion of its molecules.

    When there will be only one phase present then addition or removal of energy will lead to change in kinetic energy of the substance but no change in potential energy will take place.

    Whereas if change in phase is occurring then adding or removing any energy will lead to change in potential energy of the substance while kinetic energy will remain the same.

    Thus, we can conclude that correct statements are as follows.

    While only one phase is present, adding or removing energy changes PE but not KE. During a phase change, adding or removing energy changes PE but not KE.
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