Agreyhound's velocity changes from rest to 19 m/s in 2 seconds. what is the greyhound's average acceleration?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?