Answer:any of a number of subatomic particles carrying a fractional electric charge, postulated as building blocks of the hadrons. Quarks have not been directly observed but theoretical predictions based on their existence have been confirmed experimentally
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Answer:
2.) the development of railroads affected the country because historians aruge over the fact whether railroads determened the pace of economic development in nineteenth-centry America
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or
1) The first industrial revolution increased use of coal,and developed steam power
the second revolution introduced electric power ,automatic symbols and structural steel for building or construction
The correct answer is C. Plateou of Tibet. It has this name because it is the highest region of the world, but at the same time it's reasonably large (unlike single mountains).
<span>In making a good business decision; the marginal benefit is the extra profit you make from producing more goods, while marginal cost is the expense of producing them.</span>
