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Question
Which of the following pairs represent units of the same physical quantity?
Options
Kelvin and joule
Kelvin and calorie
Newton and calorie
Joule and calorie
Solution
Joule and calorie
One calorie is defined as the amount of heat needed to raise the temperature of 1 g of water from 14.5° to 15.5° at the pressure of 1 atm. Heat is a form of energy and the unit of energy is joule.
Therefore, joule and calorie represent energy.
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