Colors seen on the cover of your physics book are due to color
A) addition.
B) subtraction.
C) either of these
D) neither of these
Answer: B
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Star A has an apparent magnitude of 3 and Star B has an apparent magnitude of 5. Which star is brighter in our sky?
A) Star A B) Star B C) The two stars have the same brightness in our sky, but Star A is closer to us than Star B. D) There is not enough information to answer the question.
Molecular Speeds: The root-mean-square speed of the molecules of an ideal gas is v. The gas is now slowly compressed to one-half its original volume with no change in temperature. What is the root-mean-square speed of the molecules now?
A. 4v
B. 2v
C. v/
D. v
E. v/2
Which moons are sometimes called the Galilean moons?
A) the moons orbiting Uranus, which was once named "planet Galileo" B) the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto C) the moons that orbit their planet "backward" compared to their planet's rotation, such as Neptune's moon Triton D) the two largest moons in the solar system: Ganymede and Titan
The name for bad air is _______
What will be an ideal response?