Calculate the void space in closest packing of `n` spheres of radius 1 unit, `n` spheres of radiys `0.414` units, and `2n` spheres of radius `0.225` units.

Calculate the void space in fcc packing of n spheres of radius 1 nm, n spheres of radius 0.414 nm, and 2n spheres of radius 0.225 nm in appropriate voids.

The percent void space in close fcc packing of sphere is

The volume of a solid sphere of radius 2r units is

Surface area of a sphere whose radius is 1 unit.and height is 1 unit.

If the radius of the spheres in the close packing is R and the radius of octahedral voids is r , then r = 0.414R .

At time t>0, the volume of a sphere is increasing at a rate proportional to the reciprocal of its radius.At t=0 ,the radius of the sphere is 1 unit and at t=15 the radius of 2 units.

Radius of sphere is 7 units. What is its volume?

A solid metallic sphere of radius 8 cm is melted and recast into 'n' spherical solids of radius 1 cm. then n=

If the radius of the spheres in the close packing is R and the radius pf pctahedral voids is r , then r = 0.414R .