Answer:
dttydghcghcghdytdftygfvghxk,ghc
Explanation:
Answer:
The velocity of the ball when its hit the ground will be 54.22 m/sec
Explanation:
We have given height from which ball is dropped h = 150 m
Acceleration due to gravity 
As the ball is dropped so initial velocity will be zero so u = 0 m/sec
According to third equation of motion we know that 


So the velocity of the ball when its hit the ground will be 54.22 m/sec
optical density would increase the refraction angle going in to the material
there may be a relation between opt density and mass density ... kg/m^3