Antiquity's greatest observer of stars was named
a. Hipparchus.
b. Eratosthenes.
c. Aristotle.
d. Imhotep.
a
Physics & Space Science
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Which of these three produces the greatest tidal effect on you right now?
A) the Moon B) the Sun C) the Earth
Physics & Space Science
A rotating diatomic molecule has rotational quantum number l. The energy DIFFERENCE between adjacent energy levels
A) is independent of l. B) decreases as l increases. C) is the same for all changes in l. D) increases as l increases.
Physics & Space Science
The most common stars are
a. supergiants. b. giants. c. upper (more luminous) main sequence stars. d. white dwarfs. e. lower (less luminous) main sequence stars.
Physics & Space Science
At what rate is a 60.0-kg boy using energy when he runs up a flight of stairs 10.0-m high, in 8.00 s?
A) 80.0 W B) 75.0 W C) 736 W D) 4.80 kW E) 48 W
Physics & Space Science