Aroller coaster car is on a track that forms a circular loop in the vertical plane. if the car is to just maintain contact with the track at the top of the loop, what is the value of its centripetal acceleration at that point?

a. The value for the centripetal acceleration is g downward.

(correct answer on plato just did the mastery for this one)

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.