Question

What are the energies possessed by a liquid? Write down their equations.

Answer 1

A liquid in motion possesses the following three types of energy:

(i) Kinetic energy: It is the energy possessed by a liquid by virtue of its motion.

K.E. = `1/2"mv"^2`

K.E. per unit mass = `(1/2"mv"^2)/"m" = "v"^2/2`

(ii) Potential energy: It is the energy possessed by a liquid by virtue of its height above the ground level.

P.E. = mgh

P.E. per unit mass = `"mgh"/"m"` = gh

(iii) Pressure energy: It is the energy possessed by a liquid by virtue of its pressure.

Pressure energy per unit mass = `"P"/("m"/"v")`