It is now thought that successful linkage of complex molecules might have taken place on the ocean floor, perhaps near the hot springs at midocean rises
Indicate whether the statement is true or false
True
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Two balls of the same material, ball A and ball B, float on the surface of a pool filled with fresh water of 1000 
density. If ball A has 45% of its volume above the water, and ball B has 55% of its volume above the water, what is the ratio of radii of ball A to that of ball B?
A. .818 B. .935 C. 1.07 D. 1.22 E. None of these F. .905
A 200-kg spacecraft is launched to the Moon. While in orbit around the Moon, its weight is ________.
A. zero B. 200 kg C. about 1/6 its weight on Earth D. The answer depends on how close to the Moon the ship is orbiting.
If the wavelength of an electromagnetic wave is about the radius of the earth, what type of radiation is it?
A. X-ray B. Visible light C. Microwave D. Radio wave E. Wavelengths can't be that big.
The CO molecule would
a. probably be nonpolar. b. definitely be nonpolar. c. definitely be polar. d. probably be polar.