A thin ribbon of a silver alloy 2.00-cm wide and 0.0150-mm thick carries a current of 6.98 A perpendicular to a magnetic field. The Hall voltage is found to be 1.24 × 10^?4 V when the magnetic field is 2.50 T. Calculate n, the number of charge carriers per cubic meter
5.86 × 10^28/m3
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A calorie is about:
A. 0.24 J B. 8.3 J C. 250 J D. 4.2 J E. 4200 J
According to quantum theory,
A) individual microscopic events are inherently unpredictable. B) nature is "non-local," i.e., instantaneously connected across a distance. C) Both of the above. D) the overall statistics of large numbers of microscopic events are inherently unpredictable. E) All of the above.
What is the potential difference across C2 when C1 = 5.0 ?F, C2 = 15 ?F, C3 = 30 ?F, and V0 = 24 V?
a.
21 V
b.
19 V
c.
16 V
d.
24 V
e.
8.0 V
Light is incident normally from air onto a liquid film that is on a glass plate. The liquid film is 164 nm thick, and the liquid has index of refraction 1.60. The glass has index of refraction n = 1.50
Calculate the longest visible wavelength (as measured in air) of the light for which there will be totally destructive interference between the rays reflected from the top and bottom surfaces of the film. (Assume that the visible spectrum lies between 400 and 700 nm.)