Which answer below is not a statement of the second law of thermodynamics?
A. Real processes proceed in a preferred direction.
B. Energy does not flow spontaneously by heat from a cold to a hot reservoir.
C. The entropy of the universe increases in all natural processes.
D. In theory, heat engines working in a cycle employ reversible processes.
E. You cannot construct a heat engine, operating in a cycle that does nothing but take heat from a reservoir and perform an equal amount of work.
Answer: D
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Planetary rings are
A) nearer to their planet than any of the planet's large moons. B) orbiting in the equatorial plane of their planet. C) composed of a large number of individual particles that orbit their planet in accord with Kepler's third law. D) known to exist for all of the jovian planets in our solar system. E) All of the above
If a wave from one slit of a Young's double-slit set-up arrives at a point on the screen one wavelength behind the wave from the other slit, what is observed at that point?
a. dark fringe b. bright fringe c. multi-colored fringe d. gray fringe, neither dark nor bright
A 3rd magnitude star is 3 times brighter than a 1st magnitude star
a. True b. False Indicate whether the statement is true or false
The number of protons in the nucleus determines which element it is
a. True b. False Indicate whether the statement is true or false