Unlike atoms, molecules can:
A) rotate.
B) vibrate.
C) spin.
D) Both A and B.
E) All of the above.
D
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The most effective wavelengths to see through the clouds of Venus to the surface are ________
Fill in the blank(s) with correct word
Regarding the size, or total megatonnage, of a hydrogen bomb:
A) It is unlimited, because there is no limit to the amount of chain-reacting material that can be put together. B) It is unlimited, because there is no limit to the amount of fusible material that can be put together. C) It is limited, because of the existence of a "critical mass" for fusion, to about 20 kilotons. D) It is limited to about 10 megatons by the fact that tritium has a short half-life and thus must react very quickly. E) It is limited, because of the existence of a "critical mass" for fusion, to about one megaton.
Why do we feel type O and B stars are poor candidates for extraterrestrial life?
A) They do not have a habitable Zone. B) They don't produce enough yellow light. C) Their lifetime is too short. D) They don't produce a planetary system. E) Their habitable zone lies too close to the star.
Two thin-walled concentric conducting spheres of radii 5.0 cm and 10 cm have a potential difference of 100 V between them. (k = 1/4??0 = 8.99 × 109 N • m2/C2)
(a) What is the capacitance of this combination? (b) What is the charge carried by each sphere?