What is the overall electrical charge of an atom with 6 protons, 6 neutrons, and 5 electrons?
A) +17
B) ?5
C) +7
D) +1
E) +6
D) +1
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If a 1.0-k? resistor is connected in series with a 20-mH inductor, what is the impedance at 1.0 kHz?
A) 1.0 k? B) 1.1 k? C) 0.13 k? D) 0.13 M?
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What does this suggest regarding geologic activity on Venus? Do we expect Venus to be geologically active? How did scientists test this hypothesis?
A light-emitting diode has a power output of 0.3 W. If 590 nm is the average wavelength of the source, about how many photons are emitted per second? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, and 1 nm = 10?9 m)
a. 1021 b. 1025 c. 1018 d. 1029