Question

The relative density of a substance is 0.76, it will

$[{\rho }_{\text{water}}=1000kg{m}^{-3}]$

• A. sink in water
• B. float in water
• C. accelerate in water
• D. just float in water

Answer 1

The correct option is B

float in water

Relative density is defined as the ratio of the density of a substance with respect to water at 4°C.

So, relative density $=\frac{\text{Density of substance}}{\text{Density of water}}$

$\Rightarrow 0.76=\frac{\text{Density of substance}}{1000}$

Therefore, density of substance $=760kg{m}^{-3}$

Now, a body floats in water if the density of body is less than the density of water. Here, the density of the substance is less than the density of water, therefore, it floats.