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Forms and Transformations of Energy

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Select the correct option given below:
How much work can be obtained from 100 calories of heat energy?

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A
420 J
💡 Explanation:

$1\ cal=4.2\ J$

$\because$ Work done = heat obtained in calories $\times 4.2$

or $W=100 \times 4.2=420 J$

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