Calculate the centripetal acceleration of the earth in its orbit around the sun. assume that the earth's orbit is a circle of radius 1.50×1011m. express your answer using three significant figures and include the appropriate units.

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.