The dimmest part of sunlight is
A) red.
B) yellow.
C) yellow-green.
D) green.
E) violet.
Answer: E
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The index of refraction, n, of a material is a measure of how the speed of light changes. What can be said about the speed of light in a material with n=1.5 compared to a material with n=1.7?
A. It is the same for both. B. It is slower in the n=1.7 material. C. It is slower in the n=1.5 material. D. It depends on the wavelength of the light.
The formula mass of sulfuric acid, H2SO4, is
a. 98 u. b. 100 u. c. 66 u. d. 7 u.
A proton with mass 1.67 × 10^-27 kg moves in an accelerator with speed of 0.900c. What is its kinetic energy? (c = 3.00 × 10^8 m/s)
a. 1.95 × 10^-10 J c. 3.70 × 10^-10 J b. 1.00 × 10^-10 J d. 1.35 × 10^-10 J
Energy in Nuclear Reactions: A nuclear explosion results in a mass decrease of 2.10 g. How much energy is released during this explosion? (c = 3.00 × 108 m/s)
A. 1.89 × 1014 J B. 6.30 × 105 J C. 1.89 × 1013 J D. 2.25 × 1012 J