When a voltage difference is applied to a piece of metal wire, a 5.0-mA current flows through it
If this metal wire is now replaced with a silver wire having twice the diameter of the original wire, how much current will flow through the silver wire? The lengths of both wires are the same, and the voltage difference remains unchanged. (The resistivity of the original metal is 1.68 × 10-8 ? ? m, and the resistivity of silver is 1.59 × 10-8 ? ? m.) A) 21 mA
B) 19 mA
C) 11 mA
D) 5.3 mA
A
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A resistor and capacitor are connected in series with an applied AC voltage source. Separate voltmeter readings across the resistor and capacitor give values of 23 V and 29 V (rms), respectively. What is the effective (rms) voltage of the source?
a. 7.2 V b. 47 V c. 37 V d. 26 V e. 18 V
Maxwell Mons on Venus is a huge:
A) impact crater larger than Texas. B) shield volcano. C) rift valley. D) tectonic mountain chain, like the Himalayas. E) ocean basin larger than the Pacific Ocean.
Which of the following statements about the celestial sphere is not true?
A) The Earth is placed at the center of the celestial sphere. B) When we look in the sky, the stars all appear to be located on the celestial sphere. C) The "celestial sphere" is another name for our universe. D) The celestial sphere does not exist physically.
The combining of two nuclei to form a larger nucleus with the release of energy is __________
Fill in the blank(s) with correct word