Radio stations identify themselves by their position on the radio dial such as 90.1 and 93.3. this number is based on the number of waves or cycles that pass a fixed point in a specific unit of time.  to which property of a wave does this identification number refer?

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below. your friend goes first, and you follow after he has dropped a distance of 2.0m. when your friend hits the water, is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.