We want to find the rate of heat transfer from a horizontal and flat piece of ground, of size 20 m by 20 m surrounded by a fence. the ground temperature is 33 c, while the air above is 22 c and still. there is a natural convection set up. for air at these temperatures, we can approximate pr- 0.7 (as usual), k ·0.030 w/m-c and the kinematic viscosity v. 21x10-6m2/s what is the rate of heat transfer from this ground? note: if your grashof number exceeds the limits in table 8-3, our best estimate comes from using the right configuration, and just using the higher number. a)- 450 w b)-7500w c)-8.6 w d)-918 w e)- 2600 w