When the temperature of the Sun's core goes down, what happens next?
A) Fusion reactions slow down; the core expands and heats.
B) Fusion reactions speed up; the core expands and cools.
C) Fusion reactions slow down; the core shrinks and heats.
D) Fusion reactions speed up; the core shrinks and cools.
C
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What does molten rock solidify into?
a. basalt b. marble c. sandstone d. quartzite e. travertine
Your website costs less to publish if it is a simple one-color text piece than if it is a sophisticated piece with hundreds of colors.
Answer the following statement true (T) or false (F)
The vibrations of the Sun reveal information about:
A) the temperature of the core of the Sun. B) the structure of the atmosphere of the Sun. C) the interior structure of the Sun. D) the production of energy in the Sun. E) the magnetic field of the Sun.
What is the distance from the center of the Moon to the point between Earth and the Moon where the gravitational pulls of Earth and Moon are equal in magnitude?
The mass of Earth is 5.97 × 1024 kg, the mass of the Moon is 7.35 × 1022 kg, the center-to-center distance between Earth and the Moon is 3.84 × 108 m, and G = 6.67 × 10-11 N ? m2/kg2. A) 3.45 × 108 m B) 3.84 × 107 m C) 4.69 × 106 m D) 3.83 × 106 m E) 4.69 × 107 m