The electron is released from rest once it is 1 m from the proton, and travels back towards it. assuming that the proton remains stationary and the electric force is the only force acting, determine the speed of the electron when it has reached a distance of 5×102%% m from the origin.

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.