A tube of mercury with resistivity 9.84 × 10-7 ? ? m has a uniform electric field of 23 N/C inside the mercury. What is the current through the tube, if the radius of the tube is 0.495 mm?
A) 18 A
B) 180 A
C) 29 A
D) 280 A
A
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Dirty bombs may be less of a threat than people fear, because
A. once spread out, the rem level drops below the radiation illness threshold B. dirty bombs require plutonium, and that is hard for terrorists to obtain C. the radioactivity is too small to induce cancer D. the radiation does not actually get out of the bomb case, even when exploded
_____ is the closest planet to the Sun
A) Earth B) Venus C) Mercury D) Mars
In science, an unexpected change in a series of measurements is referred to as
A) a deviation B) bias C) an error D) an uncertainty
In a two-slit experiment using coherent light, the distance between the slits and the screen is 1.10 m, and the distance between the slits is 0.100 mm
If the first-order bright fringe is measured to be 3.40 cm from the centerline, what is the wavelength of the light? A) 3.09 ?m B) 241 nm C) 2.11 ?m D) 354 nm E) 133 nm