Frank stands still while throwing a dart toward a target with a speed of 25 m/s. what is the speed of the dart observed by frank compared to the speed observed by a stationary observer? the speed is 25 m/s for both people. the speed is greater than 25 m/s for frank only. the speed is greater than 25 m/s for the observer only. the speed is less than 25 m/s for both people.

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.

There are no answer choices, so an example would be: it takes a long time and a lot of precision to sew a shirt by hand, so a machine was created to do the job instead.

All u need to do is see how 50cm work with each other