In the first stage of a two-stage carnot engine, energy is absorbed as heat q1 at temperature t1 = 500 k, work w1 is done, and energy is expelled as heat q2 at a lower temperature t2 = 430 k. the second stage absorbs that energy as heat q2, does work w2, and expels energy as heat q3 at a still lower temperature t3 = 240 k. what is the efficiency of the engine?

Urgent pls a. coal consumption levels off and remains flat. b. petroleum, natural gas, and renewables show an increase in consumption c. more nonrenewable resources continued to be consumed than renewable. d. there is little projected increase in nuclear energy use. e. carbon dioxide emissions are projected to decline as we approach 2040. global energy consumption is defined as the total energy used by an individual or organizations from around the world. use the graph above to analyze the projected energy consumption from now until 2040. which statements in the prompt apply? a) a, b, d b) b, c, d c) a, c, d d) a, b, c, d