What is the absolute magnitude of our Sun?
A) -23.0
B) -4.6
C) -1.4
D) +4.8
E) +9.4
D
Physics & Space Science
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If the average velocity is non-zero over a time interval, does this mean that the instantaneous velocity is never zero over that same time interval?
A. Yes B. No
Physics & Space Science
One mole of 27 13Al has a mass of _______ g.
A. 13 B. 27 C. 14 D. 20 E. 40
Physics & Space Science
What is one atomic mass unit?
a. The mass of a hydrogen atom at the Earth's surface. b. The mass of an oxygen atom in outer space. c. The mass of a carbon atom. d. One-twelfth of a carbon atom. e. One-twentieth the mass of a uranium atom.
Physics & Space Science
A billion solar mass black hole has a radius of only:
A) one solar diameter. B) 20 A.U. C) 400 A.U. D) 3 parsecs. E) 20 parsecs.
Physics & Space Science