The magnetic force between parallel wires is used by the National Bureau of Standards to define the
A) Newton.
B) Tesla.
C) square-meter.
D) Ampere.
E) Coulomb.
D
Physics & Space Science
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Which is the most distant active galaxy?
a. Seyfert galaxies b. Radio galaxies c. Quasars d. BL Lac objects
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The decibel level of sound is related to its
A) wavelength. B) intensity. C) velocity. D) frequency. E) pitch.
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The time of flight of a projectile, fired horizontally over level ground, is independent of its horizontal ________.
Fill in the blank(s) with the appropriate word(s).
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Air moves from
A) a region of low pressure to a region of high pressure. B) a region of high pressure to a region of low pressure. C) a region of stability to a region of instability. D) a cold front to a warm front.
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