Which of the following is not a unit of heat energy ?

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joule

kelvin

calorie

None of these

answer is B.

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Detailed Solution

kelvin

Kelvin is not a unit of heat energy; it is a unit of temperature.

Detailed Explanation:

When discussing heat energy, it's important to distinguish between the concepts of heat energy and temperature.

Heat energy refers to the energy transferred between objects or systems due to a difference in temperature. It is measured in units like Joules (J), Calories (cal), and British Thermal Units (BTUs).
Temperature, on the other hand, is a measure of the degree of hotness or coldness of an object or environment. It is a scalar quantity, indicating the energy state of matter. The unit of temperature is Kelvin (K), Celsius (°C), or Fahrenheit (°F).

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