Which position in this diagram represents Earth on the day that we have the longest amount of daylight in the continental United States?
A) 1
B) 2
C) 3
D) 4
B) 2
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A sample of iron weighs more after it rusts because
A) it has expanded into a greater volume. B) rust contains twice as many iron atoms. C) of the additional oxygen it contains. D) Wrong. Iron actually weighs less after it rusts.
What part of the Copernican model was incorrect?
What will be an ideal response?
A shift in the position of an emission line of an element toward the red or blue is produced by ____
a. atoms that become ionized b. electrons that transfer from a high energy level to a low energy level c. electrons that transfer from a low energy level to a high energy level d. the intensity of agitation of atoms in a hot gas e. the motion of an object toward or away from the observer
A proton, which has a mass of 1.67 × 10-27, is moving at 0.80c relative to the laboratory. What does a physicist in that lab measure for its momentum? (c = 3.0 × 108 m/s)
A) 4.0 × 10-19 kg ? m/s B) 4.4 × 10-19 kg ? m/s C) 5.0 × 10-19 kg ? m/s D) 5.8 × 10-19 kg ? m/s E) 6.7 × 10-19 kg ? m/s