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Which of the following statements is true? a. Heat is the degree of hotness or coldness of a body.b.Heat energy that flows to or from a substance while the temperature remains constant is called sensible heat.c.A cooker-grill is a practical application of radiationd.The unit of specific latent heat of fusion is J/(kg K).

Question

Which of the following statements is true? a. Heat is the degree of hotness or coldness of a body.b.Heat energy that flows to or from a substance while the temperature remains constant is called sensible heat.c.A cooker-grill is a practical application of radiationd.The unit of specific latent heat of fusion is J/(kg K).

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Solution

The statement that is true is c. A cooker-grill is a practical application of radiation.

Here's why the other statements are not true:

a. Heat is not the degree of hotness or coldness of a body. That's temperature. Heat is a form of energy that is transferred between systems or objects with different temperatures.

b. The heat energy that flows to or from a substance while the temperature remains constant is called latent heat, not sensible heat. Sensible heat causes a change in temperature.

d. The unit of specific latent heat of fusion is J/kg, not J/(kg K). The latter is the unit for specific heat capacity.

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