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 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.

The correct answer is (C) Technological changes have increased the efficiency of oil-fired power plants..

Explanation:

Given that the contribution of fossil fuels constitutes the majority of the current energy mix, and taking into account the growing demand for energy and carbon intensity, we are at a crossroads: designing a new intelligent energy model. The energy challenge we face must have a global response, in which all available, conventional and alternative forms of energy coexist; all those forms of energy that can be produced in a balanced, safe way, with universal accessibility, competitive and respectful with the environment.

Much of what has served us in the past will not work in the future, with the great exception of innovation and technology as they will continue to be the fundamental keys to building a new energy model.

answercold,maybe nuclear war;

among other factors, composers started writing dynamic markings in their scores because "new instruments allowed for more dynamic ranges and contrast."

dynamics allude to the loudness or softness of music. dynamics offer an approach to demonstrate articulation in sheet music. they to drive the enthusiastic substance of music through volume and force. maybe you could alter both the volume and the shading profundity on your screen at the same time. we can likewise think about the force side of elements as the quality of a note. a few notes are intended to be played delicately and gently, while others are intended to be played all the more firmly.  

some dynamics markings have a letter 'm,' which remains for mezzo, signifying 'medium.' so a mezzo piano unique stamping resembles this (mp) and intends to play medium calm, while a mezzo specialty dynamic resembles this (mf) and intends to play medium loud.