The mass of a car is 2000kg. It starts from rest and attains a speed of 15m/s in 3 sec. Calculate (a). Work done on the car by the engine
(b). Average power of the engine

the answer is b

explanation:

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.