How do you find the speed of an electromagnetic wave? multiply the wavelength by the frequency. dvide the frequency by the wavelength. add the wavelength plus the frequency. divide the wavelength by the frequency.

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.