If a sample of metal weighs 210 gm in the air- 180 gm in water-A- Relative density of liquid is 10B- Relative density of metal is 7C- Relative density of liquid is 1 - 3D- Relative density of metal is 3

The correct option is B Relative density of metal is 7 Density=mass/volume Volume of water displaced = volume of the body =v. mass water displaced = (210 180)g ...

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Standard VII

Physics

Density

If a sample o...

Question

If a sample of metal weighs 210 gm in the air, 180 gm in water.

Relative density of metal is 3

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Relative density of metal is 7

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Relative density of liquid is 10

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Relative density of liquid is (1/3)

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Solution

The correct option is B
Relative density of metal is 7

$D e n s i t y = \frac{m a s s}{v o l u m e}$

Volume of water displaced = volume of the body =v.

mass water displaced = (210-180)g =30 g [Archimeds principle]

$Relative density of metal = \frac{\frac{210}{v}}{\frac{210 - 180}{v}} = 7$ .

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If a sample of metal weighs 210 gm in the air, 180 gm in water.

The correct option is B Relative density of metal is 7 Density=massvolume Volume of water displaced = volume of the body =v. mass water displaced = (210-180)g =30 g [Archimeds principle] Relative density of metal=210v210−180v=7.

The correct option is B
Relative density of metal is 7

$D e n s i t y = \frac{m a s s}{v o l u m e}$

Volume of water displaced = volume of the body =v.

mass water displaced = (210-180)g =30 g [Archimeds principle]

$Relative density of metal = \frac{\frac{210}{v}}{\frac{210 - 180}{v}} = 7$ .