The relative humidity __________ as air gets drier.

When there is an addition of water vapour to the air of enclosed space, a gain in __________ is said to occur.

When α is absorptivity, ρ is reflectivity and τ is transmittivity, then for a diathermanous body,

The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as

If the condenser temperature is kept constant, the coefficient of performance of a refrigeration cycle increases with the increase in evaporator temperature.