A surface receiving sound is moved from its original.

Did the universe cool off or get hotter as it expanded after the 'big bang"?

Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.

It takes longer to fly an airplane against a with it