Convert 5280 feet to furlongs

5,280 feet = 1 mile
1 furlong = 660 feet = 220 yards = 1/8 mile
5,280 feet = 8 furlongs

You can see how lucky we are to be able to stick with
our familiar units of measure, instead of being forced
to change to the confusing metric system.

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.