Wavelength = (speed)/(frequency) = 300,000,000/120,000,000 = 2.5 meters
As the substance gains thermal energy, the density of a fluid decreases.
When the particles of a substance have more thermal energy, they move faster and farther apart.
Density is the closeness of the particles of a substance. The closer the particles, the higher the density.
The main cause of weather is uneven heating of the earth's surface.
There are various factors that contribute to weather, however the main factor is the uneven heating of the earths surface. This creates temperature differences and can cause water to evaporate and condense. This, combined with earth's spin lead to large scale weather systems and wind currents. These in turn are influenced by land forms, bodies of water, and even vegetation.