Why isn't Earth a perfect sphere?
A. Earth's magnetic field causes the equator to bulge out.
B. Rotation causes the equator to bulge out.
C. Rotation causes the poles to bulge out.
D. Earth is perfectly round.
Answer: B
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In the wave model, light is ________.
A. a mix of electric and magnetic energy B. a packet of energy moving through space C. a compression wave moving through the air D. a ripple in space-time E. the absence of dark
On Earth, on which day do you expect the length of daytime to be roughly equal to the length of nighttime?
A) February 21 B) December 21 C) January 21 D) June 21 E) March 21
A car increases its speed from 60 to 65 miles per hour in the same time that a bicycle increases its speed from rest to 5 miles per hour. Acceleration is
1) greater for the car, 2) greater for the bicycle, 3) the same for each, principally because 4) the car undergoes the greater change in velocity. 5) the bicycle has considerably less mass. 6) both undergo equal increases in velocity during the same interval of time.
The study of the behavior of atoms and atomic particles is referred to as:
A) quantum mechanics. B) thermodynamics. C) the electromagnetic theory. D) theory of computations.