The ball rolled 15 meters in 3 seconds. What was the speed of the ball?

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical

Provide a well-written hypothesis that can explore the function of the counterweight in a trebuchet.

Acertain sound is recorded by a microphone. the same microphone then detects a second sound, which is identical to the first one except that the amplitude of the pressure fluctuations is larger. in addition to the larger amplitude, what distinguishes the second sound from the first one? it is perceived as higher in pitch. it is perceived as louder. it has a higher frequency. it has a longer wavelength.