A rifle is used during the biathlon event in the Olympics. The rifle has a mass of 3 kg and the bullet has a mass of 0.015 kg. After it is shot, the bullet travels
at a speed of 450 m/s. What is the total momentum of the rifle bullet system
after the bullet is shot?
A. 1350 kg-m/s
OB. 0 kg-m/s
O C. 6.75 kg-m/s
D. 1365 kg-m/s

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.