Which among the following is measured using a Vernier Capiller?

A - Dimensions

B - Time

C - Sound

D - Temperature

Answer : A

Explanation

A barometer is a scientific instrument used to measure air pressure.

Which among the following is used to listen and record underwater sounds ?

A - Altimeter

B - Sonar

C - Hydrophone

D - RADAR

Answer : C

Explanation

An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level.