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.
C
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A total solar eclipse occurred in Wolf Point, Montana on Feb. 26, 1979 . When was (will) this eclipse again (be) visible in Montana?
a. August of 1979 b. March of 2033 c. March of 1997 d. March of 1979 e. January of 2000
The work performed as a function of time for a process is given by where What is the instantaneous power output at
A) 99 W B) 69 W C) 139 W D) 208 W
The making of abundant iron nuclei is typical of:
A) planetary nebula ejection. B) the helium flash. C) all novae. D) type I supernovae. E) type II supernovae.
How is Einstein's famous equation, E = mc2, important in understanding the Sun?
A) The Sun has a magnetic field strong enough to influence the atmospheres of the planets. B) The Sun's surface temperature is about 6,000° Celsius. C) The Sun is extremely massive. D) The Sun generates energy to shine by losing 4 million tons of mass each second.