If a white dwarf gains sufficient mass, it can become a:
A) brown dwarf.
B) type II supernova.
C) type I supernova.
D) planetary nebula.
E) black dwarf.
C
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A temperature difference of 9.0 Celsius degrees is equal to a Fahrenheit temperature difference of
a. 5.0 Fahrenheit degrees. b. 9.0 Fahrenheit degrees. c. 16 Fahrenheit degrees. d. 37 Fahrenheit degrees. e. 41 Fahrenheit degrees.
Why do the patterns of the stars in our sky look the same from year to year?
A) because the stars in the constellations are so far away B) because the stars in the constellations are not moving C) because the stars in the constellations all move at the same speeds and in the same directions, so they don't change their relative positions D) because the stars in the constellations typically move so slowly – typically about the speed of a snail – that their motions are not noticeable
The most abundant component of the atmospheres of Uranus and Neptune is
A) hydrogen. B) helium. C) methane. D) ammonia. E) nitrogen.
A baseball (1 kg) has an energy of 100 joules. If its uncertainty in position is 1 m, what is the percentage uncertainty (Dp/p × 10^0) in the momentum of the baseball?
a. <<1% b. 1% c. 2% d. 5% e. 10%