Air pollution from the combustion of fossil fuels can lead to an increased occurrence of acid rain. If acid rain causes the water in a stream to become more acidic, what is the most likely effect on the geology of the stream bed?

A: The rocks in the stream bed weather at a slower rate

B: The population of fish in the stream increases

C: The population of the fish in the stream decreases

D: The rocks in the stream bed weather at a faster rate

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)