Which of the following energy change involves frictional force? i. Pot – McqOptions

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1.	Which of the following energy change involves frictional force? i. Potential energy to sound energy ii. Chemical energy to heat energy iii. Kinetic energy to heat energy iv. Chemical energy to heat energy Choose the correct option among the following:
A.	Both (i) and (ii)
B.	Only (iv)
C.	Both (ii) and (iii)
D.	Only (iii)
Answer» E.

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