A goldfish bowl is spherical, 8.0 cm in radius. A goldfish is swimming 3.0 cm from the wall of the bowl. Where does the fish appear to be to an observer outside?
The index of refraction of water is 1.33. Neglect the effect of the glass wall of the bowl.
A) 3.3 cm inside the bowl
B) 3.9 cm inside the bowl
C) 2.5 cm inside the bowl
D) 3.0 cm inside the bowl
E) 1.7 cm inside the bowl
Answer: C
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The textbook shows a graph of the history of U.S. energy use since 1950. According to this graph, which of the following resources presently delivers the most energy [or energy equivalent] annually to the United States?
A) coal B) renewable forms such as hydroelectric and solar C) conservation, considered as equivalent to an energy resource D) oil E) nuclear
As you go higher and higher above the surface of the Earth, the mass of a body __________
Fill in the blank(s) with correct word
When uranium-238 (Z = 92) is bombarded with a neutron, it can change into __________
Fill in the blank(s) with correct word
Two wires A and B with circular cross sections are made of the same metal and have equal lengths, but the resistance of wire A is three times greater than that of wire B. What is the ratio of the radius of A to that of B?
1.3 2.?3 3.1 4.1/?3 5.1/3