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CBSE Class 9 Science Question 21 of 33

Gravitation — Question 21

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Question 21

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

Answer

Given,

Volume of substance = 20 cm3

Mass of substance = 50 g

Density of water = 1 gcm-3

Density of the substance = ?

Density = MassVolume\dfrac{\text{Mass}}{\text{Volume}} = 5020\dfrac{50}{20} = 2.5 gcm-3

As density of the substance is greater than density of water. Hence, the substance will sink.