A length of wire has a resistance of 18.0
When the wire is uniformly stretched to triple it original length, what resistance results?
A. 162
B. 54.0
C. 18.0
D. 6.00
E. 2.00
A. 162
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In addition to the electric force law and the magnetic force law, the other key principle that is needed to explain electromagnetic waves is
A) electromagnetic forces can be felt across a distance. B) Newton's law of motion. C) electromagnetic fields are established instantaneously. D) forces always come in pairs, so for every sender of electromagnetic force there must be a receiver. E) electromagnetic fields are not established instantaneously.
Magnetic fields are produced by
A) a tiny fraction of moving electrical charges. B) most moving electrical charges. C) all moving electrical charges.
A roller skate at rest may have
A) speed. B) velocity. C) momentum. D) energy.
The ________ Belt bodies orbit beyond Neptune, but like the planets stay close to the ecliptic plane and in fairly circular orbits
Fill in the blank(s) with correct word