A hollow sphere of radius R is ma'de of a metal of density P. Show that the sphere will float in water if the thickness of the wall of the sphere satisfies the relation : `t le R/(3P)`

A hollow sphere of external radius R and thickness t(ltltR) is made of a metal of density rho . The sphere will float in water if

A hollow sphere of external radius 5 cm and of same thickness is made by melting a solid sphere of radius 4cm , then what will be the thickness of the hollow sphere

A hollow metal sphere of radius 5 cm is charged such that potential on its surface is 10V. What is the potential at the center of the sphere?

Two solid sphere of radii 3 cm and 4 cm are melted to make a hollow sphere of external radius of 6 cm, then wahat will be the thickness of the new hollow sphere?

A solid sphere of radius r is melted and cast into the shape of a solid cone of height r, the radius of the base of the cone is____

A sphere of radius R has a volume density of charge rho= kr , where r is the distance from the centre of the sphere and k is constant. The magnitude of the electric field which exists at the surface of the sphere is given by ( epsi_(0) = permittivity of free space)