Earlier than a certain time, the laws of modern physics cannot describe the universe adequately. Roughly when is that time?
A: 10^43 seconds
B: 10^33 seconds
C: 1 minute
D: 3 minutes
E: 1 million years
Ans: A: 10^43 seconds
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Indicate whether the statement is true or false
The horizontal axis (X-axis) of the Hertzsprung-Russell diagram is labeled with _______________
Fill in the blank(s) with correct word
Satellite Motion: In another solar system, a planet has a moon that is 4.0 × 105 m in diameter. Measurements reveal that this moon takes 3.0 × 105 s to make each orbit of diameter 1.8 × 108 m. What is the mass of the planet? (G = 6.67 × 10-11 N ? m2/kg2)
A. 1.2 × 1024 kg B. 1.7 × 1024 kg C. 2.4 × 1024 kg D. 3.4 × 1024 kg E. 4.8 × 1024 kg
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A) mass times acceleration. B) mass times energy. C) momentum times velocity. D) mass times velocity.