The lowest point in the potential energy curve on an energy diagram is
A. The turning point
B. Point of smallest total energy
C. Point of largest total energy
D. Point of largest velocity
Ans: D. Point of largest velocity
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Lenses can be used to focus sunlight to a small point to burn paper or dry brush. A person demonstrates this using their own eyeglasses as the lenses. From this you can tell that
A. the person is either near- or farsighted but not both. B. the person is farsighted. C. the person is both near- and farsighted. D. the person is nearsighted.
The greenhouse effect is bad for Earth
a. True b. False Indicate whether the statement is true or false
Plate tectonics states that
A) the continents move through Earth's crust like an icebreaker through ice. B) earthquakes occur because tectonic plates break like a dropped dinner plate. C) tectonic plates have not moved since Pangaea broke up. D) tectonic plates are in slow, but constant motion.
A planar loop consisting of seven turns of wire, each of which encloses 200 cm2, is oriented perpendicularly to a magnetic field that increases uniformly in magnitude from 14 × 10^–3 T to 38 × 10^–3 T in a time of 8.0 × 10^–3 s. What is the resulting induced current in the coil if the resistance of the coil is 5.0 ??
a. 1.2E–2 A b. 1.2E+0 A c. 1.3E–1 A d. 8.4E–2 A e. 7.7E–1 A