Arrange the following distances in order from smallest to largest. I. kilometer II. light-year III. yard IV. astronomical unit
a. I, II, III, IV
b. IV, III, II, I
c. III, I, IV, II
d. II, I, IV, III
e. III, I, II, IV
c
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Triton orbits in the same direction as Neptune's rotation
a. True b. False Indicate whether the statement is true or false
You are racing away from Earth in a super space ship in which you can continually increase your speed by firing engines that never quit. Which of the following best explains how people on Earth will perceive your speed?
A) They will see your speed getting closer and closer to the speed of light, but never reaching it. B) They will know you are going very fast, but will have no way to know if you ever exceed the speed of light. C) They will see you speed up until you reach the speed of light, and then your speed will remain constant after that. D) They will see you going faster and faster until you reach the speed of light, and after that they won't be able to see you any more.
Which of the following statements are true?
(i) When a pulse on a rope reflects from a rigid boundary, it is always inverted. (ii) When a pulse on rope encounters a second rope (with different characteristics from the first) that is tied to the first one, there is only sometimes a reflected pulse.
1.(i) is true, but (ii) is false 2.(ii) is true, but (i) is false 3.They are both true. 4.They are both false.A coaxial cable has an inner cylindrical conductor surrounded by cylindrical insulation and an outer cylindrical conducting shell. The outer shell carries the same current but in the opposite direction from that in the inner conductor as shown. If the coaxial cable sits in a uniform magnetic field directed upwards with respect to the cable, the effect of the field on the cable is
a.
a net force to the left.
b.
a net force to the right.
c.
a net force upwards.
d.
no net force but a slight shift of the inner conductor to the left and the outer conductor to the right.
e.
no net force but a slight shift of the inner conductor to the right and the outer conductor to the left.