A straight bar magnet is initially 4 cm long, with the north pole on the right and the south pole on the left. If you cut the magnet in half, the right half will
A) contain only a north pole.
B) contain a north pole on the right and a south pole on the left.
C) contain only a south pole.
D) no longer contain any poles.
B
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Which person’s watch or clocks register(s) a coordinate time between those events in some inertial frame?
A. Alice B. Bob C. Carol D. Alice and Bob E. Bob and Carol F. Alice and Carol T. All three observers
If the object distance (s) is less than the focal length (f) then the image is ____________
Fill in the blank(s) with correct word
Tensional forces cause the crust to
A) buckle and fold, thereby shortening the crustal surface. B) buckle and fold, thereby lengthening the crustal surface. C) stretch and pull, thereby shortening the crustal surface. D) break and fracture, thereby lengthening the crustal surface.
When a moving spaceship emits regularly-spaced flashes of light, how frequently you see the flashes depends on the ship
A) approaching you. B) receding from you. C) either of these D) none of these