The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car travelling 80 mph can stop in 400 ft, how many feet will it take the same car to stop when it is travelling 64 mph?

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.