A +5.0-nC charge is at the point (0.00 m, 0.00 m) and a -2.0-nC charge is at (3.0 m, 0.00 m). What work is required to bring a 1.0-nC charge from very far away to point (0.00 m, 4.0 m)? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 15 nJ
B) 3.6 nJ
C) 11 nJ
D) 7.7 nJ
D
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Polarized light passes through a polarizer. If the electric vector of the polarized light is horizontal what, in terms of the initial intensity I0, is the intensity of the light that passes through a polarizer if the polarizer is tilted 22.5° from the horizontal?
A) 0.854I0 B) 0.147I0 C) 0.191I0 D) 0.011I0
Describe what a scientific test of astrology would involve
What will be an ideal response?
Two emerging beams of light produced by a birefringent crystal
A) are at different frequencies. B) will produce an interference pattern when recombined. C) are polarized in the same direction. D) are polarized in mutually perpendicular directions. E) are at 90° with respect to one another.
Which of the following statements about lunar phases is true?
A) It is possible to have two full moons during November, but not during December. B) The full moon sometimes rises around midnight. C) The time between new moons is two weeks. D) The time from one new moon to the next new moon is the same as the time from first-quarter moon to third-quarter moon. E) It is possible to have two full moons during January, but not during February.