How can I solve these to get my answer?

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

Asystematic approach to problem solving is called a (an)

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?