The velocity of small ball of mass $m$ and density $\rho $ when dropped in a container filled with glycerine of density $\sigma $ becomes constant after sometime. The viscous force acting on the ball in the final stage is
$mg\left( {\frac{\sigma }{\rho }} \right)$
$mg\left( {1 + \frac{\sigma }{\rho }} \right)$
$mg\left( {1 - \frac{\sigma }{\rho }} \right)$
$mg$
What is the pressure on a swimmer $20 \,m$ below the surface of water is ..... $atm$
In making an alloy, a substance of specific gravity $s_1$ and mass $m_1$ is mixed with another substance of specific gravity $s_2$ and mass $m_2$ then the specific gravity of the alloy is
A cubical block is floating in a liquid with half of its volume immersed in the liquid. When the whole system accelerates upwards with a net acceleration of $g/3$ The fraction of volume immersed in the liquid will be
A wooden block with a coin placed on its top floats in water as shown in figure. $l$ and $h$ are as shown. After some time the coin falls into the water then
A wooden block, with a coin placed on its top, floats in water as shown in fig. the distance $l$ and $h$ are shown there. After some time the coin falls into the water. Then