A current-carrying coil of wire is
A) a superconductor.
B) a superconducting magnet.
C) an electromagnet.
D) a magplane in the making.
Answer: C
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Which of the following is true of the Ptolemaic model of the Universe?
A) It predicted the positions of the planets with fair accuracy at first. B) It went against Aristotle's beliefs of the Universe. C) It strengthened the first principles of Aristotle. D) It placed Earth at the exact center of the Universe.
What is the order of star colors with increasing temperature?
a. red, yellow, blue b. blue, red, yellow c. red, blue, yellow d. yellow, red, blue e. blue, yellow, red
In a velocity selector consisting of perpendicular electric and magnetic fields, the speeds of the charged particles passing through the selector are increased or decreased until they are equal to the desired speed
A) True B) False
Atoms with the same atomic number but with different numbers of neutrons are referred to as
A) positrons. B) nucleons. C) nuclides. D) isotopes. E) none of the given answers