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Standard X

Physics

Energy

Taking the un...

Question

Taking the unit of work as Joule and the unit of amount of heat as K cal, the magnitude in Joule for mechanical equivalence of heat is:

1

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4.2 \times 10^{7}

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4.2

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4.2 \times 10^{3}

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Solution

The correct option is D $4.2 \times 10^{3}$
$1 k c a l = 4.2 \times 1000 = 4.2 \times 10^{3} J$

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Taking the unit of work as Joule and the unit of amount of heat as K cal, the magnitude in Joule for mechanical equivalence of heat is:

The correct option is D 4.2×1031 kcal=4.2×1000=4.2×103 J

The correct option is D $4.2 \times 10^{3}$
$1 k c a l = 4.2 \times 1000 = 4.2 \times 10^{3} J$