The largest single dish radio telescope is ____
a. suspended on cables in a valley
b. buried deep in a mine underground
c. orbiting in space
d. suspended from balloons in the upper atmosphere
A
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If the ac peak voltage across a 100-ohm resistor is 120 V, then the average power dissipated by the resistor is
A) 102 W. B) 288 W. C) 72 W. D) 144 W. E) 220 W.
Most of the batholithic-sized plutons found in the continents are composed of
A) obsidian. B) basalt. C) granite. D) sandstone.
A particle with charge -40.0 nC is on the x axis at the point with coordinate x = 0. A second particle, with charge -20.0 nC, is on the x axis at x = 0.500 m. There is a point between x = 0 and x = 500 mm where the electric field is zero. Is the electric potential zero at this point?
1.No; it is positive. 2.Yes. 3.No; it is negative.