Identify the scenarios below as to whether they would increase, decrease, or not change the velocity of the sound wave. Assume that no other changes are happening. a. Lowering the humidity of the air b. Increasing the temperature of the air c. Leaving the density of the air constant d. Changing the direction of the wind so that it’s blowing in the opposite direction of the sound wave

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.