What are the two fundamental laws that lie at the heart of quantum mechanics?
A) (1) the uncertainty principle and (2) the exclusion principle
B) (1) the absoluteness of the speed of light and (2) the equivalence principle
C) (1) the law of conservation of energy and (2) the electromagnetic force law
D) (1) the law of conservation of angular momentum and (2) the law of conservation of energy
A) (1) the uncertainty principle and (2) the exclusion principle
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Why don't low-mass stars have the CNO cycle occurring in their cores?
A) The CNO cycle makes elements heavier than carbon, nitrogen, and oxygen. B) They don't have enough carbon, nitrogen, and oxygen. C) Their core temperatures are too low.
White dwarfs
A) are dead stars B) are in the process of forming C) are mature stars that are fusing hydrogen into helium in their cores D) have exhausted their nuclear fuel and are in the process of dying
What surgical procedure was performed on more than half of all children in the 1930s through the 1950s in the belief that the operation prevented rheumatic fever?
What will be an ideal response?
At what angle should a water-gun be aimed in order for the water to land with the greatest horizontal range?
A) 45° B) 30° C) 0° D) 90° E) ? radians