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

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science

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.

Physics & Space Science