A machine that promises more energy output than input is
A) a fantasy.
B) commonplace in today's technology.
C) a long-shot worth investing in.
Answer: A
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After being charged from a battery, the plates of a parallel plate capacitor are moved closer together. When they are half as far apart as originally, by how much does the stored energy change?
What will be an ideal response?
If a star has an apparent magnitude of +5 and an absolute magnitude of -10, what can we say about that star? a. The star is farther than 10 parsecs away. b. The star is closer than 10 parsecs away. c. The star has a very large chromosphere. d. The star has a very large corona
e. The star is fainter than the Sun.
What are the first three harmonics of a string of linear mass density 2.00 g/m and length 0.600 m when it is subjected to tension of 50.0 N?
What will be an ideal response?
The complementary angle of the angle of an object above the horizon is the
a. zenith angle. b. altitude. c. latitude. d. noon angle.