What are black dwarfs?
A) The lowest mass main sequence stars
B) The end result of massive star evolution
C) Objects that are not quite massive enough to be stars
D) Pulsars that have slowed down and stopped spinning
E) Cooled off white dwarfs that no longer glow visibly
E
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Gamma-ray bursts seem to be associated with violent events involving _______________
a. planets b. neutron stars c. black holes d. neutron stars or black holes
In what region of the solar system is Pluto found?
A) the asteroid belt B) the Kuiper belt C) the Oort cloud D) the terrestrial planet region
What is the photon energy of red light having a wavelength of 6.40 × 102 nm? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 1.13 × 10-19 J B) 1.31 × 10-19 J C) 3.11 × 10-19 J D) 1.94 × 10-19 J
Which of these does not describe a metal at room temperature?A) gas B) solid C) liquid D) shiny E) bendable
A) gas B) solid C) liquid D) shiny E) bendable