Question

If two completely identical systems are mixed T1 and T2 in an insulating container, then the...

If two completely identical systems are mixed T1 and T2 in an insulating container, then the final temperature of the mixture is equal to:

Select one:
a. (T1-T2) / 2
b. T2-T1
c. (T1T2) 1/2
d. (T1 + T2) / 2
e. T1T2 / 2

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Calculate the efficiency of the Karno machine running between 200oC and 1000oC tanks

Select one:
a. 80%
b. 68.20%
c. 37.2%
d. 62.8%
e. 60

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