If a twin goes on a trip in a high-speed rocket ship, when she returns home she will be younger than her twin sister who did not go on the trip because of
a. time dilation.
b. length contraction.
c. the equivalence of mass and energy.
d. the principle of relativity.
e. none of the above.
a
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Spherical Mirrors: An upright object is 50 cm from a concave mirror of radius 60 cm. The character of the image is
A. real and upright. B. real and inverted. C. virtual and upright. D. virtual and inverted.
What does the exclusion principle say?
A) Two fermions cannot occupy the same quantum state at the same time. B) No two particles of any type can ever occupy the same quantum state at the same time. C) If a particle has a precisely defined position it is excluded from having a precisely defined momentum. D) The laws of quantum mechanics are excluded from our common sense.
A diatomic has a moment of inertia of 7.73 × 10-45 kg? m2. What is its rotational energy in the quantum state characterized by l = 2? (h = 6.626 × 10-34 J ? s, h = 1.055 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 87.1 µeV B) 27.0 µeV C) 72.2 µeV D) 587 µeV E) 22.7 µeV
A 1200-W toaster draws more current than a 1000-W toaster
Indicate whether the statement is true or false