Question

Find the mass of a hollow sphere of lead,with external diameter 10 cm and thickness 2 mm,if 1 cm^3 of lead weighs 11.4 gm.

Answer 1

Multiply the volume by the density. The volume is the difference between that of a 5.0 cm radius sphere and a 4.8 cm radius sphere.

M = (4/3)*pi[5.0^2 - 4.8^2](cm^3)*11.4 g/cm^3