Magnifying Glass With the Image at the Near Point of the Eye: A person with normal eyesight uses a converging lens of focal length 10 cm as a magnifying glass to finish an engraving job. To see detail, he holds the lens very close to his eyes. What is the maximum angular magnification of the lens under these circumstances?
A. 3.5
B. 4.5
C. 6.5
D. 7.5
E. 8.5
Answer: A
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If L represents angular momentum, I represents rotational inertia, p represents linear momentum, m represents mass, and r represents a distance, which of the following can represent kinetic energy?
A. p2/2m B. L2/2I C. rpI D. all of the above E. both (a) and (b)
In simple harmonic motion, when is the speed the greatest? (There could be more than one correct choice.)
A) when the magnitude of the acceleration is a maximum B) when the potential energy is a maximum C) when the potential energy is a zero D) when the displacement is a maximum E) when the magnitude of the acceleration is a minimum
A transformer only works with AC
a. True b. False Indicate whether the statement is true or false
____ occur when the Moon is first or third quarter
a. Neap tides b. Spring tides c. Total solar eclipses d. Annular eclipses e. A coppery red Moon will