The Doppler effect is characteristic of
A) water waves.
B) sound waves.
C) light waves.
D) all of the above
E) none of the above
Answer: D
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A lens that is curved inwards at the center on both sides so that the lens has greater thickness at its edges is called
a) a convex lens. b) a refracting lens. c) a converging lens. d) a concave lens.
On the graphs shown, you can identify an ice age by looking for __________.
A. a trough (bottom of a dip) on the temperature graph B. a peak on the temperature graph C. a trough (bottom of a dip) on the carbon dioxide graph D. a place on the temperature graph where the temperature curve falls steeply
If a star rises about 9 PM tonight, and with the sidereal day being four minutes less than the solar one, then in a month it will rise about 7 PM
Indicate whether the statement is true or false
A point charge (5.0 pC) is located at the center of a spherical surface (radius = 2.0 cm), and a charge of 3.0 pC is spread uniformly upon this surface. Determine the magnitude of the electric field 1.0 cm from the point charge.
A. 0.72 kN/C B. 0.45 kN/C C. 0.63 kN/C D. 0.90 kN/C E. 0.18 kN/C