If the temperature of the liquid is lower than the saturation temperature for the existing pressure, it is called a saturation liquid.()
查看答案
Thermodynamics deals with systems in equilibrium; it may be used to predict the amount of energy required to change a system from one equilibrium state to another.()
It is possible to construct a device that operates in a cycle and whose sole effect is transfer of heat from a cooler body to a hotter body.()
A steady flow is one in which all conditions at any point in a stream remain constant with respect to time, but the conditions may be different at different points.()
Compressibility should have to be taken into account to predict wind force on buildings or to predict any other physical quantity that is a direct effect of wind.()