Near the equator, the earth's magnetic field points almost horizontally to the north and has magnitude b=.5 x 10^-4t. what should be the magnitude and direction of the velocity of an electron if its weight is to be exactly balanced by the magnetic force?

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a.m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?