Question

which is the odd one out the joule the calorie the erg the newton

Answer 1

$\huge\mathfrak\purple{Heya}$

ANSWER:

Newton ✔️✔️

Reason: Joule, Erg, and Calorie are the units of heat whereas Newton is not.
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Answer 2

The odd one among all the options given, namely, Joule, Calorie, Erg and Newton is Newton.

This is because, except Newton, all the others namely, Joule, Calorie and Erg are the units of heat or energy.

Newton is the SI unit of force. Since all the other units denote the same physical quantity, and it is only Newton which denotes another physical quantity, that is, force, this is the odd one out.