A temperature change of 20 C° corresponds to a Fahrenheit temperature change of
A) 68 F°.
B) 11 F°.
C) 36 F°.
D) 18 F°.
C
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Which of the following explains why electrons must arrange themselves in atoms with no more than two per energy level, thus making chemistry possible?
A) the exclusion principle B) the uncertainty principle C) the law of conservation of energy D) the law of conservation of angular momentum E) the electromagnetic force law
The acceleration produced by an unbalanced force acting on an object is
a. inversely proportional to the mass of the object. b. directly proportional to the magnitude of the force. c. in the direction of the force. d. all of these.
Which of the following is true of the orbits of all the planets in our solar system?
a. They all orbit at the same speed. b. They are all made out of gas. c. They all orbit the Sun in the same direction. d. They have many different orbital inclinations.
The universal accelerating force could NOT be considered:
A) antigravity. B) Einstein's cosmological constant. C) dark energy. D) vacuum pressure. E) dark matter.