The diffusion constant for water in air is
What is the distance a water molecule can travel by diffusion in 10min?
A. 17 cm
B. 20 cm
C. 25 cm
D. 31 cm
E. 36 cm
A. 17 cm
Physics & Space Science
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Which of the following is a main sequence star hotter than the Sun? (Note: the Sun is a G2V star.)
A. O2II B. G1II C. K2V D. G1V E. G2III
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The coma around the nucleus of a comet can be 10 times the size of Earth.
Answer the following statement true (T) or false (F)
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Charles Messier mapped the night sky and identified many objects now known to be emission nebulae in his search for objects that might be confused with:
A) comets. B) asteroids. C) galaxies. D) dark nebulae. E) reflection nebulae.
Physics & Space Science
When dark energy is thrown into the mix, present observational data seem to indicate that the universe will ________
Fill in the blank(s) with correct word
Physics & Space Science