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  4. The heat produced by 1500 W heater in 14 min when used is

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Q. The heat produced by 1500 W heater in 14 min when used is

CMC MedicalCMC Medical 2007

Solution:

Heat produced $ =\frac{Pt}{J} $ $ =\frac{1500\times 14\times 60}{4.2}\text{cal} $ $ =\frac{1500\times 14\times 60}{1000\times 4.2}\text{kcal} $ $ =300\,\text{kcal} $