a.

Depth of water in a vessel

b.

Relative humidity of the air

c.

Relative density of a liquid by finding the apparent loss in weight

d.

Relative density of a liquid by the method of floatation

a.

Potential energy

b.

kinetic energy

c.

chemical energy

d.

electrical energy

a.

Beats

b.

Echoing

c.

Reverberation

d.

Resonance

a.

Volume

b.

Momentum

c.

Energy

d.

Speed