Question

Make a match.
A group
1. Fluid
2. Blunt knife
Pressure
3. Sharp needle
4. Relative density
5. Hecto Pascal

Answer 1

Fluids_ relative density, blunt knife _ sharp needle, pressure_ hacto pascal.

Normally, the specific Gravity is the ratio of density of substance to the density related to the substance. 5. Hecto pascal - atmospheric pressure.

Overall, the Atmospheric pressure is an instrument which can be used to measure the atmospheric pressure.

Answer 2

blunt knife → sharp needle
fluid → relative density
pressure → hecto pascal