You can expect to see

A. STOP signs or traffic lights on limited access highways
B. Only traffic lights in limited access highways
C. Only STOP signs on limited access highways
D. No STOP signs or traffic lights on limited access highways

What is the function of the commutator in a dc motor? a. to spin the magnet b. to change direct current into alternating current c. to change alternating current into direct current d. to spin the wire coil

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?