If a star with an absolute magnitude of x 5 has an apparent magnitude of +5, then its distance is ...

If a star with an absolute magnitude of x 5 has an apparent magnitude of +5, then its distance is

a. 1 pc.
b. 10 pc.
c. 100 pc.
d. 1000 pc.
e. 10,000 pc.

Question 2

A dime is 1.8 cm in diameter. At what distance from your eye would you have to hold a dime so that it has the same angular diameter as the full moon.

a. 2 m
b. 2 cm
c. 2 km
d. 2 inches
e. 2 ft

Question 3

If a star has a parallax of 0.02 seconds of arc, then its distance is

a. 20 pc
b. 50 pc
c. 2 pc
d. 5 pc
e. 500 pc

Question 4

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

Question 5

The total mass of a binary system can be calculated from

a. the ratio of the angular separation from the center of mass of each of the stars.
b. the distance to the binary and its radial velocity.
c. the semi major axis and period of the orbit.
d. the radial velocities of the two stars.
e. the time required for the small star to eclipse the larger star.

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If a star with an absolute magnitude of x 5 has an apparent magnitude of +5, then its distance is ...

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