Cometary impacts with Jupiter

A) are impossible to observe from Earth.
B) are spectacular but do not teach us much.
C) have been observed from Earth at least twice.
D) are extremely rare.
E) would not be catastrophic if they happened on Earth.


C

Physics & Space Science

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A compound microscope consists of an objective lens of focal length f0 and an eyepiece that by itself produces an angular magnification 25.0

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