Question

The energy required to raise a given volume of water from a well can be in

• A. megawatts
• B. meganewton
• C. megajoules
• D. kilowatts

Answer 1

The correct option is C

megajoules

The explanation for the correct option:

The correct option is C. megajoules

1. The S.I. unit of energy is the joule (J).
2. As a large amount of energy is required to raise a volume of water from a well, thus, a bigger unit of energy, megajoules, is used to denote energy.
3. $1\mathrm{MJ}={10}^6\mathrm{J}$

The explanation for incorrect options:

A. megawatts

Megawatts is a unit of power.

B. mega-newton

Mega-newton is a unit of force.

D. kilowatts

Kilowatts is a unit of power.

Thus, the energy required to raise a given volume of water from a well can be in megajoules.