When sound waves enter the outer wall of the ear, what is the first thing they strike? Group of answer choices A. the ear drum B. the cilia C. the three tiny bones of the middle ear D. the cochlea

Which pair of sentences is describing the same velocity? a. a car is parked. a car is moving in circles. b. a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c. a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d. valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.