Why is Neptune denser than Saturn?
A) Neptune has a higher proportion of hydrogen compounds and rocks than Saturn.
B) Neptune has a larger mass and stronger gravity than Saturn.
C) Neptune has a much more massive core than Saturn.
D) Neptune has a greater proportion of helium compared to hydrogen than Saturn.
A) Neptune has a higher proportion of hydrogen compounds and rocks than Saturn.
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If the diameter of a radar dish is doubled, what happens to its resolving power assuming that all other factors remain unchanged? Its resolving power
A) quadruples. B) doubles. C) halves. D) is reduced to one-quarter its original value. E) is reduced to one-half its original value.
Which planet listed has the most extreme seasons?
A) Uranus B) Mars C) Earth D) Jupiter
The chemical composition of stars can be determined from lines in their spectra
a. True b. False Indicate whether the statement is true or false