A monomer may be repeated many times in the formation of a chainlike molecule called a(n) ______________
Fill in the blank(s) with correct word
polymer
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The sun's energy output is a maximum in the visible region of the spectrum. One biological reason we might expect or predict this fact is that
A) it would be impossible for biological photosynthesis to occur if any other region dominated the solar spectrum, and thus plant life could not exist on Earth. B) the visible region comes right in the middle of the overall electromagnetic spectrum. C) visible radiation is the only type of solar radiation with enough energy to actually burn our skin. D) the human eye would be expected to evolve in such a way as to make use of the sun's main energy output. E) the visible region has the highest frequency.
The Coulomb force between two charges can be attractive or repulsive
Indicate whether the statement is true or false
Rubber rods charged by rubbing with cat fur repel each other. Glass rods charged by rubbing with silk repel each other. A rubber rod and a glass rod charged respectively as above attract each other. A possible explanation is that
a. any two rubber rods charged this way have opposite charges on them. b. any two glass rods charged this way have opposite charges on them. c. a rubber rod and a glass rod charged this way have opposite charges on them. d. all rubber rods always have an excess of positive charge on them. e. all glass rods always have an excess of negative charge on them.
Buoyant force is greater on a submerged
1) 1-kg block of lead. 2) 1-kg block of aluminum. 3) same on each Because 4) the aluminum block is larger. 5) they both have the same weight.