38. The density of aluminum is 2,700 kg/m². If transverse waves propagate at 36 m/s in a 9.2 mm diameter aluminum wire, what is the tension in the wire?

The answer would be a) -80of

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.