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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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
The relative magnetic permeability of a vacuum is equal to _________.
Fill in the blank(s) with the appropriate word(s).