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
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A copper ball with a diameter of 5.00 cm is subjected to a pressure of 
The bulk modulus for copper is 
What is the bulk strain?
A. 
B. 
C. 
D. 
E. 
Magnetic fields are produced by
A. constant electric currents. B. electric currents that vary sinusoidally with time. C. time-varying electric fields. D. all of the above. E. only (a) and (b) above.
A right isosceles triangle is cut out from a piece of sheet metal. The two equal sides are 1.0 m long each. How far is the center of gravity from the right angle (90.°) vertex of the triangle?
A) 0.71 m B) 0.55 m C) 0.47 m D) 0.24 m E) 0.35 m
The symbol indicating the number of nucleons in a nucleus is N
a. True b. False Indicate whether the statement is true or false