Question

The volume of 50g of a substance is 20cm3.If the density of water is 1 gm-3, will the substance float or sink
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Answer 1

Answer:

Given, mass of substance, m=50g;

volume, V=20cm

3

; density, ρ=?

The density of substance given is

d=

V

m

=

20cm

3

50g

=2.5gcm

−3

Hence the density of the substance is greater than the density of water. Hence the weight acting downwards Vdg is greater than the buoyant force acting upwards Vρ

water

g.

Hence the substance will sink in water.

Answer 2

Answer:

The density of the substance is more than the density of water (1 g cm^−3). Hence, the substance will sink in water.