Which refers to the number of wavelengths that pass a fixed point in a second? A. wavelength

B. amplitude

C. frequency

D. compression

It's because 3 if it was 10 it wouldn't look right do it goes up to 4d

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.

Ray 2 should cross through the focal point on the right side of the lens.

A). redi wish i´ve