Question 14 of 20 : Select the best answer for the question.
14. In industrial and commercial installations, where large motors are often 1
is it necessary to power each motor?
A. With a separate circuit
B. Using DC
C. Using AC
D. All on the same circuit
Mark for review (Will be highlighted on the review page)
Next Question >>

The substances that are necessary for producing of certain hormones and that store and transport vitamins

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.

Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. a-if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? b- what is the bearing's impact velocity?