What unit of measurement is used to describe extraordinary large distances, such as the distance of other stars from our own?
a. AU
b. min
c. ly
d. km
e. mi
c
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A plot of land contains How many square meters does it contain?
A) 2.3 × 104 m2 B) 7.1 × 103 m2 C) 7.0 × 104 m2 D) 5.0 × 104 m2
What information does 21-cm radiation provide about the gas clouds?
A) their motion B) their density C) their temperature D) their distribution E) all of the above
A very elastic rubber ball is dropped from a certain height and hits the floor with a downward speed v. Since it is so elastic, the ball bounces back with the same speed v going upward
Which of the following statements about the bounce are correct? (There could be more than one correct choice.) A) The ball had the same momentum just before and just after the bounce. B) The magnitude of the ball's momentum was the same just before and just after the bounce. C) The ball's momentum was conserved during the bounce. D) None of the above statements are correct.
What features of the telescopic view of the Andromeda Galaxy, M-31, are also visible to the naked eye for our similar Galaxy?
What will be an ideal response?