If a barbell weighs 10 pounds on the Moon, what would it weigh on Earth?
A. 30 pounds. Surface gravity on Earth is 3 times that on the Moon.
B. 10 pounds. Gravity is the same on Earth and the Moon.
C. 60 pounds. Surface gravity on Earth is 6 times that on the Moon.
D. 1.67 pounds. Surface gravity on the Moon is 1/6 that on Earth.
Answer: C
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Which person’s watch or clocks register(s) the space time interval between those events?
A. Alice B. Bob C. Carol D. Alice and Bob E. Bob and Carol F. Alice and Carol T. All three observers
Ellis and Randy are looking at a molecular absorption spectrum. The spectral lines appear to fall into two groups with a gap in the middle. Ellis says that this must be an absorption spectrum for transitions between the v = 0 and v = 1 vibrational states of a diatomic molecule. Randy says the gap in the middle must occur because a ?J = 0 transition is forbidden. Which one, if either, is correct,
and why? a. Ellis, because rotational levels are separated by greater energy differences than vibrational levels. b. Randy, because rotational levels are separated by greater energy differences than vibrational levels. c. Ellis, because the ?J = 0 transition is the most prominent spectral line in transitions between vibrational levels. d. Neither, because rotational levels are separated by greater energies that vibrational levels and ?J = 0 transitions are not forbidden. e. Both, because vibrational levels are separated by greater energy differences than rotational levels and ?J = 0 transitions are forbidden.
A 29.0-pm-wavelength photon is scattered by a stationary electron
What is the maximum energy loss the photon can have? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 15 keV B) 4.0 keV C) 6.1 keV D) 10 keV E) 12 keV
An important reason for using a very large diameter objective in an astronomical telescope is
A) to increase the magnification. B) to increase the resolution. C) to form a virtual image, which is easier to look at. D) to increase the width of the field of view. E) to increase the depth of the field of view.