A person weighing 0. 70 kn travels in a lift that has an upward acceleration of 1. 5 m/s2. What is the magnitude of the lift floor force on the person?.

I’m good with pshycology

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.

Ithink it is a. but i'm not 100 percent sure.