Car A is moving to the right with a speed of 12 m/s and car B is moving to the left with a speed of 13 m/s. Both cars have a mass of 1100 kg. What is the net momentum of the system consisting of cars A and B? (You may define positive direction to be to the right)

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.