The thermal diffusivities for gases are generally_____________________?

Related Mcqs:

Heat flowing from one side to other depends directly on ___________________?

Pick up the wrong case? A. face area B. time C. thickness D. temperature difference E. thermal conductivity...

Which of the following is expected to have highest thermal conductivity_______________?

A. steam B. solid ice C. melting ice D. water E. boiling water...

Two balls of same material and finish have their diameters in the ratio of 2 : 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of____________________?

A. 1 :1 B. 2: 1 C. 1 : 2 D. 4 : 1 E. 1 : 4...

The energy distribution of an ideal reflector at higher temperatures is largely in the range of ___________________?

A. shorter wavelength B. longer wavelength C. remains same at all wavelengths D. wavelength has nothing to do with it E. none of the above...

40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is____________________?

A. 0.45 B. 0.55 C. 0.40 D. 0.75 E. 0.60...