In research, a group of people of one age is compared to a group of people who are another age.

What if? if the temperature near the cliff suddenly falls to 0°c, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 2.90 s after kicking the rock?

What causes the formation of ocean currents?

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little