Which of the following is NOT a unit of energy?

Question

Accepted Answer

Step-by-step analysis:

- Joule (1): The joule (J) is the SI unit of energy. It can be expressed as $1\ 	ext{J}=1\ 	ext{N}\cdot	ext{m}=1\ 	ext{kg}\cdot	ext{m}^2/	ext{s}^2$.
- Calorie (2): The calorie is a unit of energy (often used in chemistry/nutrition). $1\ 	ext{cal}\approx4.184\ 	ext{J}$.
- Newton (3): The newton (N) is the SI unit of force, not energy. $1\ 	ext{N}=1\ 	ext{kg}\cdot	ext{m}/	ext{s}^2$ (dimensionally different from energy).
- Kilowatt hour (4): The kilowatt-hour (kWh) is a unit of energy: $1\ 	ext{kWh}=1000\ 	ext{W}	imes3600\ 	ext{s}=3.6	imes10^6\ 	ext{J}$.

Therefore the quantity that is NOT a unit of energy is Newton.

FINAL_ANSWER: c

Answer

Answer

Answer