[1 Mark Question Answer]

Questions

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5 questions · timed · auto-graded

Question 11 Mark

Arrange the following substances in order of their increasing density : Iron, Cork, Brass, Water, Mercury.

Answer

Cork, Water, Iron, Brass, Mercury.

Question 21 Mark

The density of brass is $8.4\ g \ cm-3$. What do you mean by this statement?

Answer

This statement means one cubic centimetre volume of brass has mass of $8.4\ g.$

Question 31 Mark

Why does a piece of ice float on water?

Answer

FLOATATION OF ICE ON WATER: Density of $0.9 g \ cm ^{-3}$ is less than the density of water $1 g \ cm ^{-3}$. Hence, ice floats on water.

Question 41 Mark

For a floating body, how is its weight related to the buoyant force?

Answer

When a body floats in a liquid. The weight of the liquid displaced by its immersed part is equal to the total weight of the body.

Question 51 Mark

What is the unit of relative density?

Answer

UNIT OF RELATIVE DENSITY: No units since it is a pure ratio.

[1 Mark Question Answer] - PHYSICS STD 8 Questions - Vidyadip

PHYSICS [1 Mark Question Answer]