what has more potential energy, a skateboarder on top of the a 20-foot ramp, for a skateboarder on top of a 5 foot ramp ?

Gabby calls her cousin who lives in a different state and tells her to turn her radio to channel 98.7 so they can listen to their favorite song that is playing. her cousin turns her radio to 98.7, but does not hear the same song gabby hears. which most likely explains why?

Which of these is the best way to manage a natural resource

Aphase diagram assumes is kept constant.