Astronomers no longer build large observatories in populated areas in order to avoid _______________

Fill in the blank(s) with correct word


light pollution
radio interference

Physics & Space Science

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Suppose that a source of sound is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of the sound will be

A) unchanged. B) half as great. C) as great. D) twice as great. E) one-fourth as great.

Physics & Space Science

An emission spectrum can be used to identify a(n):

A) proton. B) electron. C) neutron. D) atom. E) neutrino.

Physics & Space Science

Which quantity can be converted from the English system to the metric system by the conversion factor ?

A. feet per second B. feet per hour C. miles per second D. miles per hour E. miles per minute

Physics & Space Science

The orbital resonances with Jupiter are shown in the:

A) Cassini division. B) Zone of Avoidance. C) Kirkwood Gaps. D) ring arcs. E) orbits of the aten asteroids.

Physics & Space Science