A wrench is placed at 30 cm in front of a diverging lens with a focal length of magnitude 10 cm. What is the magnification of the wrench?
A) 4.0 B) 0.67 C) -0.67 D) -0.25 E) 0.25
E
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Given the distance x that a spring is compressed, what is the potential energy of the spring?
A. 2 kx^2 B. ½ kx C. ½ kx^2 D. 2 kx
The results of statistical studies of the exoplanet systems discovered to date suggests that what proportion of stars are likely to have a planet less than half the size of the Earth and in an orbit within a star's habitable zone?
A) 10 to 20% B) 50% C) much less than 10% D) more than 90%
Olympus Mons is a
A) shield volcano on Mars. B) stratovolcano on Mercury. C) large lava plain on the Moon. D) shield volcano on Venus. E) stratovolcano on the Moon.
Light strikes a diamond (n = 2.42) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
A. 21° B. 30° C. 38° D. 69° E. 71°