For electromagnetic radiation of intensity ofwhat is the rms value of the electric field?

a.

b.

c.

d.

e.


a.

Physics & Space Science

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The runoff channels on Mars were most likely formed by

A) melting underground ice. B) catastrophic, but rare flooding C) the annual melting of the polar ice caps. D) glaciers. E) rain that was part of a water cycle.

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An object is moving with constant non-zero velocity in the +x-axis. The position versus time graph of this object is

A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. E) a hyperbolic curve.

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Does Venus have auroras around its poles, like Earth? Why or why not?

A) Yes, because it is bombarded by charged particles from the Sun. B) No, because its atmosphere is too thick. C) Yes, because strong winds generate light near its poles. D) No, because it lacks a global magnetic field.

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If two protons are moved 3 times closer together, the electrical force between them is what factor of the original force?

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