What is the phase angle between the voltages of the inductor and capacitor in a LRC series circuit?
A)
zero
B)
45°
C)
90°
D)
180°
E)
270°
D
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Over geological time periods, the Earth's climate has been
A) relatively stable B) continuously unstable C) constant and unchanging D) gradually becoming more unstable
The name of the average distance from Earth to the Sun is one ____________________
Fill in the blank(s) with correct word
Potential Energy: An electric dipole with ±5.0 ?C point charges is positioned so that the positive charge is 1.0 mm to the right of the origin and the negative charge is at the origin. How much work does it take to bring a 3.0-?C point charge from very far away to the point x = 3.0 mm, y = 0.0 mm? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 23 J B. 110 J C. 19 J D. 49 J
Why is it so difficult to take pictures of extrasolar planets?
A) Extrasolar planets give off light at different wavelengths than planets in our solar system. B) No telescope is powerful enough to detect the faint light from a distant planet. C) Their light is overwhelmed by the light from their star. D) Telescopes are too busy with other projects.