An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This means the object
A) travels 2.0 m in every second.
B) is traveling at 2.0 m/s.
C) is decreasing its velocity by 2.0 m/s every second.
D) is increasing its velocity by 2.0 m/s every second.
D
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Which of the following isotopes is radioactive?
A) Carbon-12 B) Carbon-14 C) both of these D) neither of these
Consider the curve f(x) = A cos(2?x/?). The wavelength of the wave will be:
a.
the distance 0 to A.
b.
twice the distance 0 to A.
c.
the distance x2 to x3.
d.
twice the distance x2 to x3.
Which of the following is not a feature of central dominant galaxies?
A) They're found in clusters of galaxies. B) They are spiral galaxies. C) They often have multiple galactic nuclei. D) They are thought to form through the mergers of smaller galaxies.
A Carnot engine operates between two reservoirs with unknown temperatures. If the Carnot engine operates at 67% efficiency, what is the ratio of the absolute temperatures of the reservoirs, Tc/Th?
A) 0.33 B) 0.0012 C) 0.0025 D) 0.67