If ti takes 50 seconds to lift 10 newtons of books to a height of 7 meters, calculate the power required.

the answer is 46 mls because when you add the speed per second it increses the speed

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.