The ________ of a star is a measure of the total energy radiated by the star in one second
a. color
b. apparent visual magnitude
c. luminosity class
d. spectral type
e. luminosity
e
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Acceleration: The captain orders his starship to accelerate from rest at a rate of "1 g" (1 g = 9.8 m/s2). How many days does it take the starship to reach 10% the speed of light? (Light travels at 3.0 × 108 m/s.)
Fill in the blank(s) with the appropriate word(s).
2.9x107 is the same as
a. 2.9 thousand b. 29 thousand c. 290 thousand d. 2.9 million e. 29 million
A quarterback takes the ball from the line of scrimmage, runs backward for 12 yards, then sideways parallel to the line of scrimmage for 18 yards. He then throws a 47-yard forward pass straight downfield perpendicular to the line of scrimmage. The receiver is tackled immediately. How far is the football displaced from its original position?
a. 39 yards b. 47 yards c. 31 yards d. 62 yards e. 66 yards
To the surprise of Michelson and Morley, their interferometer experiment provided evidence that the speed of light is
A) invariant. B) the same whether its source approaches or recedes. C) constant. D) all of the above