The internal friction, which retards the flow of current (electrons) through a material, is called electrical ____.

a. conduction
b. resistance
c. reduction
d. convection


b. resistance

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A dry nail polish ( paste or powder ) is best for the nails that are:

What will be an ideal response?

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On a vernier transit level, the line of sight is perpendicular to the horizontal axis when the telescope level

bubble is centered and the vertical circle/arc is set at _____. a. 0 degrees b. 90 degrees c. 180 degrees d. 270 degrees

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The electronic leak detector uses a pump to pull air samples into the unit and test them for traces of __________.

What will be an ideal response?

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For the circuit shown in Figure P5.41, assume that switches S1 and S2 have been held open for a long time prior to t = 0 but then close at t = 0. Also assume

R1 = 5?, R2 = 4?, R3 = 3?, R4 = 6?, and C1 = C2 = 4F.

a. Find the capacitor voltage vC at t = 0.
b. Find the time constant ? for t > 0.
c. Find vC and sketch the function.
d. Evaluate the ratio vC to vC (?) at each of the following times: t = 0, ?, 2?, 5?, 10? .

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