The speed of FM waves will be observed to be c = 2.9979 108 m/s when the antenna emitting the waves is
a. at rest relative to the receiving antenna.
b. moving to the right of the detecting antenna at 0.5 c.
c. moving to the left of the detecting antenna at 0.5 c.
d. moving as described in (a), (b) or (c) above.
e. moving at 2.9979 108 m/s.
[Ques. 2] At what longitude is an observer who sees the last-quarter moon on his meridian when it is 12:00 noon local solar time at 75W?
a. 165W
b. 15E
c. 15W
d. 165E
e. 75E
[Ques. 3] A(n) ______________ image is defined as one that can be brought to a focus on a screen.
a. virtual
b. real
c. upright
d. inverted
[Ques. 4] Fireworks go off at the same time according to Earth clocks in two cities, Alum and Boron, that are 300 km apart. The people in a spaceship that is flying in a straight line from Alum to Boron at 0.80 c also observe the fireworks. Do they see the fireworks in the two cities simultaneously? If the people in the spaceship say the fireworks were not simultaneous in Alum and Boron, how long before or after the fireworks flashed at Alum did the fireworks flash at Boron according to their calculations? (The spaceship is directly over Alum when the fireworks flash.)
a. Yes; 0
b. Before; 1.0 103 s
c. After; 1.0 103 s
d. Before; 1.3 103 s
e. After; 1.3 103 s
[Ques. 5] The local solar time at 75W is 12:00 noon. What is the longitude of an observer who sees the full moon on her meridian at this time?
a. 105E
b. 75E
c. 15E
d. 15W
e. None of the above
[Ques. 6] The image of a convex mirror is always
a. virtual, inverted, and larger.
b. virtual, upright, and smaller.
c. real, upright, and smaller.
d. real, inverted, and larger.
[Ques. 7] A spaceship from another galaxy passes over the solar system directly above a radial line from the sun to the Earth. (We measure that distance to be 1.5 1011 m.) On Earth, the spaceship is observed to be traveling at a speed of 0.80 c, for which = 5/3 . As measured on Earth it takes the spaceship 625 seconds to travel from the sun to Earth. When a scientist in the spaceship measures the Earth-sun distance and the time it takes her to travel that distance, she finds the results are respectively
a. 9.0 1010 m; 375 s.
b. 9.0 1010 m; 625 s.
c. 1.5 1011 m; 625 s.
d. 2.5 1011 m; 625 s.
e. 2.5 1011 m; 1042 s.
[Ques. 8] The local solar time at 135W is 12:00 noon. What is the longitude of an observer who sees the full moon on her meridian at this time?
a. 45E
b. 45E
c. 135E
d. 135W
e. None of the above
[Ques. 9] The image of an object at the focal point of a concave spherical mirror
a. looks the same as the object.
b. is said to be formed at infinity.
c. is real.
d. is reduced.
[Ques. 10] A proton has a total energy of 2.5 1010 J. How fast is it moving? (M = 1.67 1027 kg)
a. 0.90 c
b. 0.80 c
c. 0.70 c
d. 0.60 c
e. 0.40 c
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