If body P, with a positive charge, is placed in contact with body Q (initially uncharged), what will be the nature of the charge left on Q?
a. must be greater in magnitude than that on P
b. must be equal in magnitude to that on P
c. must be negative
d. must be positive
D
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In a ferroelectric material, the electric field in the reverse direction that reduces the polarization to 0 after saturation in the forward direction is called the _________electric field.
Fill in the blank(s) with the appropriate word(s).
Which of the following planets in our solar system can we see occasionally transit across the face of the Sun?
A) Mercury only B) Mercury and Venus C) Mercury, Venus, and Mars D) Mars, Jupiter, and Saturn E) all of the planets
If you toss a coin straight upward in train that slows while the coin is in the air, the coin will land
A) as if you were at rest. B) in front of you. C) in back of you.
A helium balloon rises because of
a. Archimedes' principle. b. Pascal's principle. c. Bernoulli's principle. d. Torricelli's principle. e. none of these principles.