The weight of a proton is 1.64x10^-26 N. The charge on a proton is +1.60x10^-19 C. If a proton is placed in a uniform electric field so that the electric force on the proton just balances its weight, what is the magnitude and direction of the field?

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration