-A ray IA is incident at point A on mirror M1.After reflection at mirror M1, it is incident, respectively, at mirrors M2 and M3. Find the angle which the finally-reflected ray CR makes with the plane of mirror M3.
30°
40°
50°
60°
pls help

Acricket ball of 70g moving with a velocity of 0.5 m/s is stopped by a player in 0.5s what is the force applied to stop the ball

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.