The electromagnet in a motor must rotate consistently in just one direction to transform electrical energy into mechanical energy. What causes this
rotation?
A. The terminals of the battery frequently switch from positive to
negative.
B. The commutator frequently reverses the direction of the current in
the loop of wire.
C. The poles of the permanent magnets keep switching between
north and south.
D. The commutator causes the loop of wire to keep turning in one
direction

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?

The softest and hardest minerals are: softest hardest

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d