Correct answer
D. Nu = (2/π) Gz
Explanation
The correct answer is Nu = (2/π) Gz.
Which of the following is not used as a filter medium in case of corrosive liquids?
Which of the following is generally considered as opaque surface towards radiations?
The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C- 1 respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m-2.°C-1. The rate of heat loss from the outer surface in W.m-2is________?
One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________?
The elevation in boiling point of a solution is proportional to the ________ of the solution?
The space time is equivalent to the holding time in a steady state mixed reactor for________?