1. State the Newton’s law of cooling. Defi ne heat transfer coefficient. On what factors does it depend? 2. Defi ne overall heat transfer coefficient. Comment on the relative magnitudes of the thermal...

1. State the Newton’s law of cooling. Defi ne heat transfer coefficient. On what factors does it depend?

2. Defi ne overall heat transfer coefficient. Comment on the relative magnitudes of the thermal resistances. What is the difference between U_i
and U_o?

3. What is the mode of heat transfer in vacuum? Defi ne absorptivity, reflectivity and transmissivity.