Four point charges, each of charge 2.5 x 10-5, are located on the x- and y-axes, one at each of the locations (0, 2.0 m), (0, -2.0 m), (2.0 m, 0), and (-2.0 m, 0). The potential at the origin is
A)
2.3 × 105 V.
B)
4.5 × 105 V.
C)
3.5 × 105 V.
D)
1.1 × 105 V.
E)
0.
B
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Siddhartha saved up money from his summer job to buy a powerful home theater system. When shopping for the best buy in a home theater system the sales representative informs Siddhartha that the more expensive models are worth the money because they ____.
A) amplify sound up to 160 dB B) boost frequencies below 80 Hz C) buffer sounds that reach 60 dB D) filter out frequencies below 10000 Hz
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A. 120 V B. 82 V C. 75 V D. 67 V E. 60 V
Georges-Louis de Buffon was the first to propose that the Sun and planets formed when a large vortex contracted and condensed
a. True b. False Indicate whether the statement is true or false
A sound with a frequency of 25 kHz is in the ______________ region of the sound spectrum
a. infrasonic b. ultrasonic c. audible d. visible