CPersonification <span>Personification</span>
Looks and styles
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Because the longer the focal length, the smaller the patch of sky you're observing. But a longer focal length also gives a higher possible magnification.
Answer:
density is defined as the mass of a substance per unit volume, and is highly variable in crustal rocks. Rock density is a physical characteristic that is governed by the chemical composition (in situ minerals) and pore spaces of a specific rock or rock type.
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