The geocentric model of the solar system is attributed to
a. Kepler.
b. Brahe.
c. Copernicus.
d. Aristotle.
d
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If the distance between two isolated parallel plates that are oppositely charged is doubled, the electric field between the plates is essentially unchanged. However, the:
a. charge on each plate will double. b. force on a charged particle halfway between the plates will get twice as small. c. potential difference between the plates will double. d. force on a charged particle halfway between the plates will get four times as small.
The electromagnetic force between two charged particles is much greater than the strength of gravity between them, no matter how far apart they are
Nevertheless, it is gravity, rather than the electromagnetic force, that dominates the universe on large scales. Briefly explain why.
How are rocks classified?
How much energy is in an 89.7 MHz photon of FM-radiation?
a. 2.2 × 10^-33 J b. 9.5 × 10^-27 J c. 7.4 × 10^-42 J d. 5.9 × 10^-26 J e. 3.7 × 10^-25 J