Seasons on Earth are primarily caused by

A) the distance from the Earth to the Sun.
B) the tilt of the Earth's rotational axis.
C) the tilt of the Earth's magnetic axis.
D) the precession of the Earth's rotational axis.
E) the dates of the solstices and equinoxes.


B

Physics & Space Science

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It takes the planet Jupiter 12 years to orbit the sun once in a nearly circular orbit. Assuming that Jupiter's orbit is truly circular,

what is the distance from Jupiter to the sun, given that the distance from the earth to the sun is 1.5 × 1011 m? A) 3.9 × 1011 m B) 5.2 × 1011 m C) 7.9 × 1011 m D) 9.7 × 1011 m E) 3.2 × 1012 m

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Intensity: The amplitude of the electric field for a certain type of electromagnetic wave is 570 N/C. What is the amplitude of the magnetic field for that wave? (c = 3.00 × 108 m/s)

A. 2.91 µT B. 1.90 µT C. 1.10 µT D. 1.41 µT E. 2.41 µT

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The Doppler effect applies to sound waves but not to electromagnetic waves

Indicate whether the statement is true or false

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In optical fibers of uniform density, light actually

A) curves in a direction parallel to the central axis of the fiber. B) travels in straight-line segments. C) travels along the outer surface of the fiber. D) none of the above

Physics & Space Science