Provide at least one example of acceleration and explain why it would be considered a scalar or vector quantity.

Take gravity you are accelerated toward the ground.  Since gravity has both a direction and a magnitude, then it is a vector.

Hypothesis. why don’t you know this? i learned this stuff in like 5th grade

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.