An ideal heat engine operates in a cycle and produces work as a result of heat transfer from a thermal reservoir at an elevated temperature TH and by rejecting energy to a thermal sink at TL. The efficiency for such an ideal cycle, termed a ‘‘Carnot cycle,’’ is 1 /  = −T T L H Determine the required uncertainty in the measurement of temperature to yield an uncertainty in efficiency of 1% (i. e., u / 0.01    ). Assume that the uncertainties in measuring either temperature are the same (i. e., T T T L H u u u = = ) and uncorrelated. Use TH = 1000 K and TL = 300 K.