The supernova that formed M-1, the Crab Nebula, was observed in

A) 1572 AD by Tycho Brahe.
B) 1604 AD by Johannes Kepler.
C) 1054 AD by Chinese and Middle Eastern astronomers.
D) 1006 by observers in the southern hemisphere.
E) about 9,000 BC by all our ancestors.


C

Physics & Space Science

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A.
B.
C.
D.
E.

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The symbol indicating the number of nucleons in a nucleus is N

a. True b. False Indicate whether the statement is true or false

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