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Technological improvements and reduced equipment costs have [#permalink]
25 Jun 2006, 01:59
100% (03:47) correct
0% (00:00) wrong based on 1 sessions
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Technological improvements and reduced equipment costs have made converting solar energy directly into electricity far more cost-efficient in the last decade. However, the threshold of economic viability for solar power (that is, the price per barrel to which oil would have to rise in order for new solar power plants to be more economical than new oil-fired power plants) is unchanged at thirty-five dollars.
Which of the following, if true, does most to help explain why the increased cost-efficiency of solar power has not decreased its threshold of economic viability?
(A) The cost of oil has fallen dramatically.
(B) The reduction in the cost of solar-power equipment has occurred despite increased raw material costs for that equipment.
(C) Technological changes have increased the efficiency of oil-fired power plants.
(D) Most electricity is generated by coal-fired or nuclear, rather than oil-fired, power plants.
(E) When the price of oil increases, reserves of oil not previously worth exploiting become economically viable.
Canadians now increasingly engage in â€œout-shopping,â€
1) The solar process is becoming more efficinet but the threshold does not change. This implies the oil-furnaces are also getting efficient. Option A also looks good but now way to know the reduction in the cost of oil actually improves the efficiency too.
2) Social service costs not included outside. If outside sales increase, then the amount of taxes collected by Canadian govn will increase and it will be forced to levy higher taxes.
3) option B is a very special case which cannot be concluded
option C clearly mentions that there are greater proportions of LH people in the intelligent group as compared to the group with lower intelligence. Based on the stem, this is correct
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