Apiston-cylinder device initially contains 0.08 m3 of nitrogen gas at 150 kpa and 200°c. the nitrogen is now expanded to a pressure of 80 kpa polytropically with a polytropic exponent whose value is equal to the specific heat ratio (called isentropic expansion). determine the final temperature and the boundary work done during this process.

Work done =  = 5 kJ

Explanation:

Given data:

volume of nitrogen

Polytropic exponent n = 1.4

putting all value

polytropic process is given as

work done

                  = 5 kJ

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

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