Heat transfer by radiation mainly depends upon___________________?

Related Mcqs:

Metals are good conductors of heat because________________?

A. their atoms collide frequently B. their atoms-are relatively far apart C. they contain free electrons D. they have high density E. all of the above...

The ratio of heat flow Q1/Q2 from two walls of same thickness having their thermal conductivities as ATj – 2K2 will be ________________?

A. I B. 0.5 C. 2 D. 0.25 E. 4.0...

A steam pipe is to be insulated by two insulating materials put over each other . For best results__________________?

A. better insulation should be put over pipe and better one over it B. inferior insulation should be put over pipe and better one over it C. both may be put in any order D. whether to put inferior OIL over pipe or the better one would depend on steam temperature E. unpredictable...

Which of the following property of air does not increase with rise in temperature ________________?

A. thermal conductivity B. thermal diffusivity C. density D. dynamic viscosity E. kuiematic viscosity...

The emissive power of a body depends upon its___________________?

A. temperature B. wave length C. physical nature D. all of the above E. none of the above...