Today, we know that Newton's "laws" are
A) often incorrect when applied to molecular-sized objects.
B) incapable of explaining the motions of the planets.
C) in agreement with all known experimental evidence.
D) no longer useful as scientific principles.
E) often incorrect when applied to liquids.
A
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We can study how galaxies evolve because
A) galaxies are transparent to visible light. B) we are really smart astronomers. C) we can watch as they interact in real time. D) the farther away we look, the further back in time we see.
A cylinder contains 10 moles of an ideal gas at a temperature of 300 K. The gas is compressed at constant pressure until the final volume equals 0.77 times the initial volume
The molar heat capacity at constant volume of the gas is 24.0 J/mol ? K and R = 8.31 J/mol ? K . How much heat is absorbed by the gas during this process? (R = 8.31 J/mol ? K) A) -22 kJ B) -17 kJ C) 22 kJ D) 17 kJ E) -5.7 kJ
Work is done
A. By the component of the force parallel to the displacement B. Only if the entire force is parallel to the displacement C. By the component of the force perpendicular to the displacement D. By all forces
A neutral atom always contains
a. the same number of protons as it does neutrons. b. the same number of electrons as it does neutrons. c. the same number of protons as it does electrons. d. twice as many protons as it does neutrons. e. twice as many neutrons as it does protons.