What is Sphere ?

What is a sphere ?

A cubical block of side 7 cm is surmounted by a hemi-sphere. What is the greatest diameter the hemi-sphere can have? Find the surface area of the solid.

A thin hollow sphere of mass m is completely filled with a liquid of mass m . What the sphere rolls with a velocity v, kinetic energy of the system is (neglect friciton)

A sphere of radius 0.350m, temperature 27.0^(@)C , and emissivity 0.850 is located in an environment of temperature 77.0^(@)C . At what rate does the sphere (a) emit and (b) absorb thermal radiation ? (c ) What is the sphere's net change in energy in 3.50 min ?

The volume of a sphere s 8 times that of a another sphere. What is the ratio of their surface areas?

A solid cube is put in a sphere. What is the least percentage of the volume of the sphere not occupied by the cube ?