Water vapor sometimes condenses to form water droplets called dew. when this occurs, what type of change is it?
a. physical only
b. chemical only
c. physical and chemical

May someone explain how to do this question?

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.

Ahockey player of mass 82 kg is traveling north with a velocity of 4.1 meters per second he collides with the 76 kg player traveling east at 3.4 meters per second if the two players locked together momentarily in what direction will they be going immediately after the collision how fast will they be moving