The choices below describe four hypothetical planets. Which one would you expect to have the most features of erosion? (Assume the planets orbit a star just like the Sun and that they are all the same age as the planets in our solar system.)
A) Size: same as Venus. Distance from Sun: same as Mars. Rotation rate: once every 25 hours.
B) Size: same as the Moon. Distance from Sun: same as Mars. Rotation rate: once every 10 days.
C) Size: twice as big as Earth. Distance from Sun: same as Mercury. Rotation rate: once every 6 months.
D) Size: same as Mars. Distance from Sun: same as Earth. Rotation rate: once every 18 hours.
A
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The relative magnetic permeability of a vacuum is equal to _________.
Fill in the blank(s) with the appropriate word(s).
Why does the star's core get hotter as the core shrinks?
A. The core spins faster and friction heats it. B. The core is compressed and compression heats a gas. C. The fusing elements settle there to liberate their heat. D. The statement is false. A shrinking core cools. E. None of these choices is correct.
What capacitance will have the same reactance as a 100. mH inductance in a 120. V, 60. Hz circuit?
What will be an ideal response?
Which of the following rocks is a sedimentary rock?
a. Slate b. Granite c. Marble d. Conglomerate