The lowest possible temperature is
A) 0°C.
B) -273°C.
C) 4 K.
Answer: B
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The mass of 238U is not quite an integer multiple of 1H mass. This is primarily because
a. the proton and neutron have different masses. b. there are several isotopes of uranium. c. of the binding energy of uranium. d. uranium is radioactive.
Which of the following lists the planets of our solar system in the correct order from closest to farthest from the Sun?
A) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune B) Mercury, Earth, Venus, Mars, Jupiter, Saturn, Neptune, Uranus C) Mercury, Venus, Mars, Earth, Saturn, Jupiter, Neptune, Uranus D) Earth, Mars, Mercury, Venus, Jupiter, Saturn, Uranus, Neptune
Uh-oh, the malicious eight-dimensional alien beings are back. This time, imagine that they suddenly changed nature so that neither the uncertainty principle nor the exclusion principle applied to electrons
What would happen almost immediately to atoms? A) Atoms would annihilate each other, releasing huge amounts of energy. B) Atoms would be immediately ionized. C) Nothing; atoms would be unaffected by this change. D) Electrons would fall into the nuclei of atoms.
Three masses are located as follows: a 3.0-kg mass is at the origin, a 4.5-kg mass at (0.0 m, 4.0 m), and a 2.5-kg mass at (3.0 m, 0.0 m). What is the gravitational energy of the system of masses? G = 6.67 x 10-11 N•m2/kg2
A) -3.8 × 10-10 J B) -3.9 × 10-10 J C) -5.4 × 10-10 J D) -3.2 × 10-10 J E) -3.5 × 10-10 J