Mechanical Waves are waves which propagate through a material medium (solid, liquid, or gas) at a wave speed which depends on the elastic and inertial properties of that medium. There are two basic types of wave motion for mechanical waves: longitudinal waves and transverse waves. The animations below demonstrate both types of wave and illustrate the difference between the motion of the wave and the motion of the particles in the medium through which the wave is travelling.
If the temperature of the air is said to be at absolute zero, one might conclude that a. the molecules contain a minimum amount of energy. b. the motion of the molecules is at a maximum. c. the molecules are occupying a large volume. the molecules contain a minimum amount of energy.
In simplest terms, dew fall occurs when the air temperature and the dewpoint temperature are equal. Remember, the dewpoint temperature is the temperature at which the air becomes saturated (relative humidity becomes 100%). Saturation is the point at which the air is holding all the water vapor that it can hold. On most days, the dewpoint does not change very much, while the air temperature may change 20-30 degrees.