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CBSE Class 9 Answered

solution
Asked by rohitkasbe11 | 20 Mar, 2020, 12:11: AM
Expert Answer
Q.1. - A block weighs 165 g in air  and 130 g in water. Calculate the volume and specific gravity.

Solution  -
Let the volume of block be V

By Archimede's principle,

mass of object in air  - apparent mass when submergerd in water = density of water x volume of object

165 g - 130 g = 1 x V
V = 35 g

Specific gravity also known as relative density = density of object/density of water = mass of object in air/Volume of object/density of water
Thus,
Specific gravity = 165/35/1 = 4.7

Answered by Shiwani Sawant | 20 Mar, 2020, 01:03: PM

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