If all else is constant, which would cause the greatest increase in kinetic energy of a moving object? mass and velocity are each reduced by one-half. mass is reduced by one-half, and velocity is doubled. mass is doubled, and velocity is reduced by one-half. mass and velocity are each doubled.

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.