Which of the following was believed by Aristotle as a first principle?
A) Earth was flat.
B) The heavens were perfect.
C) The Sun was at the center of the Universe.
D) Heavenly objects moved in a circular path at varying speeds.
B
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Apparent retrograde motion occurs when a planet appears to
A) be stationary with respect to background stars B) move eastward with respect to background stars C) move due north with respect to background stars D) move westward with respect to background stars
If the 5th-order fringe in Young's double-slit experiment occurs at an angle of 38.7°, what is the relationship between the wavelength ? and the distance between slits, d?
a. d = 3.12? b. d = 40.00? c. d = 8.00? d. d = 10.30? e. d = 0.12?
The reaction 2H + 2H ? 3H + 1H releases 4.03 MeV of energy. If one kilogram of deuterium were made to go through this reaction, how much energy would be produced?
A) 9.7 × 107 J B) 9.7 × 1013 J C) 1.9 × 107 J D) 1.9 × 1014 J E) 1.9 × 1011 J
The radius of curvature for a plane (flat) mirror is
A) negative. B) infinite. C) zero. D) imaginary.