Gordon, the night custodian, dusts off a classroom globe with a feather duster, causing the globe to acquire a charge of 8.0 *10^9 C. What is the magnitude and direction of the electric field at a point 0.40 m from the center of the charged globe?

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

In a system, when potential energy decreases, then entropy also decreases. true false

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.