The most famous prehistoric astronomical observatory is:
A) the Sphinx.
B) Stonehenge.
C) Big Horn stone circle.
D) Carcacol.
E) Mount Rushmore.
B
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A ball is thrown straight up. At what point does the ball have the most energy?
(a) At the highest point of its path. (b) When it is first thrown. (c) Just before it hits the ground. (d) When the ball is halfway to the highest point of its path. (e) Everywhere; the energy of the ball is the same at all of these points.
Which of the above molecules contains a carbonyl group?
A) a B) all but a C) all but b D) c E) all but d
When a capacitor is fully charged, the current through the capacitor in a direct-current circuit is
a. zero. b. at its maximum value. c. equal to the current in a resistive circuit in parallel with the capacitor circuit. d. greater than the current in a resistor that is farther from the battery than the capacitor. e. zero if it is the only capacitor, but maximum if there is another capacitor in series with it.
The function of the glass fibers in fiberglass is to increase the ______________.
Fill in the blank(s) with the appropriate word(s).