The inverse of Hubble's constant (1/H) gives the approximate ________.
A. magnitude of the cosmic horizon
B. density of the Universe
C. age of the Universe
D. size of the Universe
Answer: C
Physics & Space Science
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Absolute zero corresponds to a temperature of
A) 0 K. B) -273° C. C) both of these D) none of the above
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The resistance of the light bulb is 20 ohms
Indicate whether the statement is true or false
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Spiral arms are regions of star formation, which accounts for their blue color
Indicate whether the statement is true or false
Physics & Space Science
The strongest magnetic fields in the photosphere lie near
A) sunspots. B) auroras. C) prominences. D) granules. E) flares.
Physics & Space Science