What does the exclusion principle say?
A) Two fermions cannot occupy the same quantum state at the same time.
B) No two particles of any type can ever occupy the same quantum state at the same time.
C) If a particle has a precisely defined position it is excluded from having a precisely defined momentum.
D) The laws of quantum mechanics are excluded from our common sense.
A) Two fermions cannot occupy the same quantum state at the same time.
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The mountains of the Alps in Europe are examples of ______________ mountains
Fill in the blank(s) with correct word
If a Ping-Pong ball and a golf ball both move in the same direction with the same amount of kinetic energy, the speed of the Ping-Pong ball must be
A) less than the golf ball. B) more than the golf ball. C) both the same D) need more information
No stars have been found with masses greater than 300 times our Sun because
A) molecular clouds do not have enough material to form such massive stars. B) they would fragment into binary stars because of their rapid rotation. C) they would generate so much power that they would blow themselves apart. D) they shine exclusively at X-ray wavelengths and become difficult to detect. E) they are not bright enough to be seen nearby.
Over time, the star-gas-star cycle leads the gas in the Milky Way to
A) have a greater abundance of heavy elements. B) have a lower abundance of heavy elements. C) become denser and have a greater abundance of heavy elements. D) become denser and hotter.