What was the last geological period in Earth's history during which the dinosaurs lived?
A) The Cretaceous Period
B) The Tertiary Period
C) The Triassic Period
D) The Carboniferous Period
A
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What features are conspicuously absent from the far side of the Moon? Why?
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A student has made the statement that the electric flux through one half of a Gaussian surface is always equal to the flux through the other half of the Gaussian surface. This is
a. never true. b. never false. c. true whenever enclosed charge is symmetrically located at a center point, on a center line, or on a centrally placed plane. d. true whenever no charge is enclosed within the Gaussian surface. e. true only when no charge is enclosed within the Gaussian surface.
The size and sign of the charge on an electron is the same as that for
a. a positron. b. an antiproton. c. an antineutron. d. an antineutrino.
A flat circular coil having 16 turns, each of diameter 20 cm, is in a uniform and steady 0.13-T magnetic field
(a) Find the total magnetic flux through the coil when the field is perpendicular to the plane of the coil. (b) If the coil is rotated in 10 ms so its plane is parallel to the field, find the average induced emf in the coil.