Under what circumstances can differentiation occur in a planet?

A) The planet must have a rocky surface.
B) The planet must be made of both metal and rock.
C) The planet must have an atmosphere.
D) The planet must be geologically active, that is, have volcanoes, planetquakes, and erosion from weather.
E) The planet must have a molten interior.


E

Physics & Space Science

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The image formed by a concave mirror when the object distance is greater than the focal length is always

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