The planet HAT-P-32b has more than twice the radius of Jupiter, yet is only the same mass. It orbits its star more than a factor of ten closer than Mercury's orbit around the Sun. Which is the most plausible explanation for its large size?
A) Planets that are close to a star are heated up and therefore larger.
B) The mass measurement is mistaken, and it is actually about 10 times more massive than Jupiter.
C) The hydrogen and helium gas compressed under their own gravity.
D) It is made of elements other than hydrogen and helium which do not compress under their own gravity.
A
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Saturn's cloud surface appears more uniform than Jupiter's because
A) there is a thick outer cloud covering of water ice overlying the colorful ices. B) due to Saturn's lower gravity, the colorful cloud layers escaped. C) it is composed of completely different gases than Jupiter's. D) the cloud layers are thicker, allowing fewer holes to see the colorful layers. E) due to Saturn's greater distance from the Sun, the colorful cloud layers are just not visible.
One of the harmonics of a column of air in a tube that is open at one end and closed at the other has a frequency of 448 Hz, and the next higher harmonic has a frequency of 576 Hz. How long is the tube? The speed of sound in air is 343 m/s
A) 1.34 m B) 0.670 m C) 0.335 m D) 1.00 m E) 2.68 m
The major credit for the development of the periodic table goes to
a. Berzelius. b. Lavoisier. c. Boyle. d. Mendeleev.
Volcanoes that explode violently tend to have magmas of
a. high temperature and low silica content. b. high temperature and high silica content. c. low temperature and low silica content. d. low temperature and high silica content.