The radius of the biggest metal coin of thickness t and density `rho` which would be able to float on water surface of surface of water is `rho`

What is the radius of the biggest aluminium coin of thickness t and density rho , which will still be able to that on the water surface of surface tension S ?

A needle of length l and density rho will float on a liquid of surface tension sigma if its radius r is less than or equal to:

A needle of length l and density rho will float on a liquid of surface tension sigma if its radius r is less than or equal to:

A hollow sphere of external radius R and thickness t( lt lt R) is made of a metal of density rho . The sphere will float in water if (Take density of water = "1 g cm"^(-3) )

The escape velocity from the surface of the earth of radius R and density rho

The escape velocity from the surface of the earth of radius R and density rho

A hollow sphere of radius R is made of a material of relative density rho . It will float if the thickness of its surface is

A dry clean steel needle of diameter d and density rho when carefully placed on the surface of water remains floating . If T is the surface tension of water , then maximum value for the diameter d of the needle for enabling it to float will be

A dry clean steel needle of diameter d and density rho when carefully placed on the surface of water remains floating . If T is the surface tension of water , then maximum value for the diameter d of the needle for enabling it to float will be