According to models of planetary interiors, the differences in mass among the four jovian planets (Jupiter, Saturn, Uranus, and Neptune) are due primarily to differences

A) in the amounts of material in the layers extending from the tops of their cores to their surfaces.
B) in their core masses.
C) in composition.
D) in density.


A) in the amounts of material in the layers extending from the tops of their cores to their surfaces.

Physics & Space Science

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The toy drinking bird nicely illustrates

A) evaporation. B) condensation. C) both of these D) neither of these

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A) bandpass B) sensitivity C) bandwidth D) band

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A mirror with a focal length -25 cm has a 4.0 cm tall object placed 100 cm in front of it. What is the height of the image?

A) 0.8 cm B) 20 cm C) 4.0 cm D) -0.8 cm E) -20 cm

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