A 2.0 kg bicycle wheel with a radius of 0.30 m turns at a constant angular speed of 25 rad/s when a 0.30kg reflector is at a distance of 0.19m from the axle. What is the angular speed of the wheel when the reflector slides to a distance of 0.25m from the axle?

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.

Answer4 million;

If the woman is just hanging off the bar then i think each arm will support 350n  and if she accelerates 1400n