211) When absorptivity (?) = 1, reflectivity (?) = 0 and transmittivity (?) = 0, then the body is said to be a
Answer is:
black body
Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers
Answer is:
superheated vapour
Answer is:
(2k1xk2)/(k1+k2)
Answer is:
above which a gas will never liquified
Explanation:
Gases can be converted to liquids by compressing the gas at a suitable temperature.
Gases become more difficult to liquefy as the temperature increases because the kinetic energies of the particles that make up the gas also increase.
The critical temperature of a substance is the temperature at and above which vapor of the substance cannot be liquefied, no matter how much pressure is applied.
