Matthew was bowling. He bowled with a 12 pound ball at first then used a 10 pound ball. If matthew uses the same amount of force to roll the bowling balls, which one would roll faster? F- the 12 pound ball
G - they would roll the exact same speed
H - the 10 pound ball
J - none of the above

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

If you put a helium-filled balloon in the refrigerator, what will happen?

Ablue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.5 m/s 2 . a green car arrives at the position of the stop-light 6.5 s after the light had turned green. if t = 0 when the light turns green, at what time does the green car catch the blue car if the green car maintains the slowest constant speed necessary to catch up to the blue car? answer in units of s.