What is the effect of the expansion of the universe?
a. The distant galaxies are getting farther apart from each other.
b. Each galaxy is getting larger.
c. The solar system is getting larger.
d. All of the above.
Answer: a. The distant galaxies are getting farther apart from each other.
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In order to get an object moving, you must push harder on it than it pushes back on you
A) True B) False
Because S-waves do not travel through Earth's outer core, scientists inferred that the outer core is
A) impenetrable. B) molten liquid. C) solid. D) very dense.
The intensity of radiation reaching the Earth from the Sun is 1350 W/m2. The Earth's radius is 6.4 × 106 m. How big a force does this radiation exert on the Earth? (Assume it is all absorbed.)
A. 5.8 × 108 N B. 1.2 × 109 N C. 2.3 × 109 N D. 4.6 × 109 N E. 1.7 × 1017 N
The sun makes most of its energy by the CNO cycle
Indicate whether the statement is true or false