Question

if the answers are correct will mark as brainlist ​

Answer 1

Answer:

Explanation:

3) the quantity of mass per unit volume of a substance. d=mass/volume

4)The S.I unit of density is kg/m³

5) Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.

Answer 2

Explanation:

Density of a substance is its mass per unit volume.

$p = mass \div volume$

Relative density has no units because it a ration of a substance to the density of water at 4°C

On heating from 0°C , the density of water increases upto 4°C and then decreases beyond 4°C