If we represent the Milky Way Galaxy as the size of a grapefruit (10-cm diameter), the distance to the Andromeda Galaxy would be about
A) 10 cm.
B) 3 m.
C) 30 m.
D) 1 km.
E) 100 km.
B
Physics & Space Science
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A ball rolls along a horizontal track in a certain time. If the track has a small upward dent in it, the time to roll the length of the track will be
A) less. B) the same. C) more.
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When observing a very distant quasar, we are actually seeing the universe the way it was when it was much younger than it is today
Indicate whether the statement is true or false
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Although a magnet can change the direction of travel of an electron beam, it cannot change its
A) speed B) kinetic energy. C) both of these D) neither of these
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