Find the velocity in meter per second of a student running down a 40 m hall in 3.5s.

Ididn’t pass this test sorry

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.

Sound wavelength of visible light waves

Hi.the measurement  amperes represents the rate at which current flows.it's like the measurement of water flowing through a pipe.~