One of the rare galaxies that is isolated in space is likely to be a(n) ____
a. starburst galaxy
b. ultra luminous infrared galaxy
c. dwarf galaxy
d. antenna galaxy
e. spiral galaxy
e
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A pencil, 15.7 cm long, is released from a vertical position with the eraser end resting on a table
The eraser does not slip. Treat the pencil like a uniform rod. What is the angular speed of the pencil just before it hits the table? A) 17.2 rad/s B) 7.23 rad/s C) 3.70 rad/s D) 24.5 rad/s E) 16.8 rad/s
The Tully-Fisher relation allows us to determine the distance to the most distant galaxies
Indicate whether the statement is true or false
A uniform film of oil (n = 1.31) is floating on water. When sunlight in air is incident normally on the film, an observer finds that the reflected light has a brightness maximum at l = 450 nm and a brightness minimum at l = 600 nm. What is the thickness of the oil film?
The heat we enjoy on a sunny day is due mainly to the Sun's
A) high surface temperature. B) relatively close distance. C) enormous size. D) none of the above