In a hypernova, a very energetic supernova creates a
A) set of planets to orbit their neutron star host.
B) black hole.
C) millisecond pulsar.
D) very visible supernova remnant.
E) white dwarf and its planetary nebula.
B
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Two carbon cylinders have radii r and 2r and the first has length 2L, while the second has length L. What is the resistance of the first if the resistance of the second is 12 
A. 6
B. 1.5
C. 3
D. 24
E. 96
F. 48
If the Moon is too far from Earth during a solar eclipse, the _____ does not reach Earth's surface
a. umbra b. ecliptic c. prominence d. penumbra e. solar disk
A proton (1.67 × 10-27 kg) is accelerated to 99.8% the speed of light. How much energy did the accelerator have to impart?
A) 14.8 GeV B) 13.9 GeV C) 38.9 GeV D) 7.52 GeV E) 223. GeV
Most nearby stars move relative to the Sun at speeds below about 30 km/s. Suppose you observe a nearby star that is moving much faster than this (say, 300 km/s). Which of the following is a likely explanation for its high speed?
A) It has been pushed to high speed by the shock wave from a nearby supernova. B) It is a very young star, recently formed. C) It is probably a halo star that is currently passing through the disk. D) It is a very high mass star.