Interference is a property of
A) sound waves.
B) water waves.
C) light waves.
D) all of the above
E) none of the above
Answer: D
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Negative temperature coefficients of resistivity
A) exist in superconductors. B) do not exist. C) exist in semiconductors. D) exist in conductors.
On a prescription for eyeglass lenses, what does the quantity expressed in diopters refer to?
a. The thickness of eyeglass lenses. b. The limitations of the person's eyes. c. The width of the eyeglass lens. d. The strength of eyeglass lenses. e. The curvature of eyeglass lenses.
The average rate of erosion on the Moon is far less than on Earth because:
A) the crust of the Moon is much denser than the Earth's crust. B) the Moon is much younger than the Earth. C) the Moon lacks wind, water and an atmosphere. D) the Moon's magnetic field protects it from the solar wind better than ours does. E) the Moon's mare long ago dried up, so there is no more wave erosion there.
Beta rays can penetrate
A) air only. B) a piece of paper. C) several millimeters of aluminum. D) several centimeters of lead. E) several meters of iron.