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

answer: i don't know the answer good luck

explanation:

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.