Question

Which of the following pairs represent units of the same physical quantity?

(a) Kelvin and joule
(b) Kelvin and calorie
(c) Newton and calorie
(d) Joule and calorie

Answer 1

(d) 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^o to 15.5^o 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.