Question

the volume of 70g of a substance is 30 cubic cm. If the density of water is 1.2 gram per cubic cm, will the substance float or sink?
​

Answer 1

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

​

Hence the substance will sink in water.

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Answer 2

Answer:

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