2. The convection heat transfer coefficient can have a great effect on how a person experiences temperature. Determine the convection heat flux from a person's hand in each of the circumstances below. In each case, the person's hand can be assumed to have a surface temperature of 30C. (a) Hand outside the window of a car moving at 20 mph in air at -15C with a convection coefficient of 40 W/m-K. (b) Hand in a slow moving stream of water at 10C with a convection coefficient of 900 W/m-K. (c) Hand in still air in an air conditioned room at 20C with a convection coefficient of 3 W/m-K.