a nearsighted man cannot see objects clearly that are beyond 50 cm from a size determine the focal length and power of the glasses that will enable him to see distant objects clearly ​

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.

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.