There are no known exceptions to
A) the law of conservation of energy.
B) Newton's law of motion.
C) Both of the above.
D) Nonsense--all physical principles have known exceptions.
A
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An electron has a speed of 0.643c. Through what potential difference would the electron need to be accelerated (starting from rest) in order to reach this speed? (c = 3.00 × 108 m/s, e = 1.60 × 10-19 C, mel = 9.11 × 10-31 kg)
A) 160 kV B) 200 kV C) 130 kV D) 180 kV
Water, ImageO, and methane, CImage, have about the same mass and differ by only one type of atom. Why is the boiling point of water so much higher than that of methane?
A) The water molecule is less symmetrical than is the methane molecule. B) The oxygen of a water molecule has two lone pairs of electrons. C) The electronegativity difference between oxygen and hydrogen is greater than the electronegativity difference between carbon and hydrogen. D) all of the above
Multiple-Object Accelerating Systems: A 3.0-kg mass and a 5.0-kg mass hang vertically at the opposite ends of a very light rope that goes over an ideal pulley. If the masses are gently released, what is the resulting acceleration of the masses?
A. 0.00 m/s2 B. 3.7 m/s2 C. 2.5 m/s2 D. 4.9 m/s2 E. 6.1 m/s2
Which of the following processes is consistent with the law of conservation of four-momentum? a) A particle moving eastward collides with and sticks to an identical particle at rest. The resulting single particle remains at rest but is more massive than the sum of the original particles’ masses.
A. C B. F