Which of the following molecules would probably be isolated closest to the bottom of a fractionating tower at a refinery?

A) C4H10
B) C8H18
C) C10H22
D) C20H42
E) C40H82


Answer: E

Physics & Space Science

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Both the hole and the top of the tank are open to the air. We can ignore air resistance and treat water as an ideal fluid with a density of 1000 kg/m3. (a) How many cubic meters of water per second is this tank losing? (b) How fast is the water from the hole moving just as it reaches the ground?

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Neglect any frictional effects. A) 14 m/s B) 18 m/s C) 10 m/s D) 9.0 m/s E) 6.0 m/s

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Why are penumbral eclipses less obvious than partial eclipses?

What will be an ideal response?

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Suppose you were near a site with mercury pollution and were told that a plant could take mercury up, but that it would emit mercury vapor. Would it be worth planting these plants? Why or why not? (This is an expected phenomenon.)

What will be an ideal response?

Physics & Space Science