Question

the volume of 50g substance is and 20 cm cube if the density of the water is 10 centimetre - 3 will the substance float or sink

Answer 1

AnswEr:

Given,

• Volume, V = 20 cm³
• Mass, m = 50 g
• Density = 1 g cm³

• Density of substance :

$\tt \: \frac{m}{v} = \frac{50}{20} = 2.5 \: g \: per \: {cm}^{3}$

• Relative Density :

$\tt \frac{2.5}{1} = 2.5$

Since, relative density is greater than 1 , then the substance will sinks.

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Relative Density :

The ratio of the density of a substance to that of the density of water is called relative density.

: It has no unit as it is a ratio.

• If relative density >1, then body sinks in water.
• If relative density <1, then body floats in water.
• If relative density = 1 , then body float while completely immersed in water.