Gauss law to find the magnitude of the electric field
A point charge q = 1.7 x 10^-7 C is at the center of a spherical cavity of radius 2.3 cm in a chunk of metal. Use Gauss' law to find the magnitude (in N/C) of the electric field (a) 1.3 cm from the cavity center and (b) anyplace in the metal.
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A uniform surface charge of density 8.6 nC/m^2 is distributed over the entire xy plane. What is the electric flux through a spherical Gaussian surface centered on the origin and having a radius of 8.1 cm?
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You should determine the velocity as a function of r, R. viscosity, and pressure gradient. Draw the velocity distribution and the shear stress distribution vs. r for this flow.
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(a) What was the net charge enclosed by the outer surface before Q was introduced? (b) What is charge Q ? After Q is introduced, what is the charge on the (c) inner and (d) outer surface of the conductor? Give answers in nC.
The sensitivity of a new cells scan as a screening test for detecting cancer is 0.94, while its specificity is 0.97. It is estimated that in a particular population 5% of women and 10% of men have cancer.
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