# A classical mechanics problem by puneet mangla

Classical Mechanics Level pending

A spherical source of surface temperature $$150^\circ C$$ is emitting heat radiations at a constant rate of $$48\pi \text{ J/s}$$. The conductivity of air is 1/30. Find the minimum distance in meter from the center of sphere from which a person can feel comfortable. The radius of the sphere is 2 m.

Details and Assumptions:

• A person is comfortable only in surrounding temperature i.e $$30^\circ C$$.