Spherical Mirrors: A plant that is 4.0 cm tall is placed 15 cm from a concave spherical mirror having a focal length of magnitude 20 cm. Where is the image located?
A. 12 cm behind the mirror
B. 12 cm in front of the mirror
C. 60 cm behind the mirror
D. 60 cm in front of the mirror
Answer: C
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Size of the Nucleus: How many nucleons would you expect a nucleus to contain if its diameter is 13.4 fm?
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1. In a maximally efficient heat engine, the amount of entropy that the hot reservoir loses as heat flows out of it is exactly balanced by the entropy that the cold reservoir gains as the waste heat flows into it.
When you look at a single-slit diffraction pattern produced on a screen by light of a single wavelength, you see a bright central maximum and a number of maxima on either side, their intensity decreasing with distance from the central maximum. If the width of the slit is increased,
a. the pattern shrinks in size (central maximum less wide; other maxima in closer to it). b. the pattern increases in size (central maximum wider; other maxima farther from it). c. it does not affect the size of the pattern. d. the width of the central maximum increases, but the other maxima do not change in position or width. e. the width of the central maximum decreases, but the other maxima do not change in position or width.
What happens when the index of refraction is equal to 1?
a. No refraction occurs. b. Light cannot pass into the material. c. An average amount of refraction takes place. d. The maximum possible refraction occurs. e. The index of refraction cannot be calculated for this material.