Spiral arms are clearly visible features of galaxies because most sun-like stars in the disk are found there
a. True
b. False
Indicate whether the statement is true or false
False
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What is the occupancy probability at an energy of 12.00 eV for a material with EF = 11.63 eV at a temperature of 500 K?
A) 3 x 10-4 % B) 2 x 10-2 % C) 2% D) 6% E) 12%
What is the major difference between an elliptical galaxy and a spiral galaxy?
A) A spiral galaxy contains mostly younger stars. B) A spiral galaxy has a spherical halo. C) An elliptical galaxy lacks a disk component. D) Elliptical galaxies are not as big as spiral galaxies. E) There are no dwarf spiral galaxies, but there are dwarf ellipticals.
If 2.0 kg of water at 0°C is to be vaporized, how much heat must be added?
A) 1080 cal B) 1080 kcal C) 1140 cal D) 1280 cal E) 1280 kcal
The absence of folded mountain ranges on Mars suggests that it has been subjected to plate tectonics
Indicate whether the statement is true or false