Which of the following is NOT an artificial source of background radiation? nuclear weapons

radon gas

medical X-rays

nuclear power stations

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

The slope of a velocity time graph over any interval of time gives the during that interval

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.