Kingda Ka is the worlds tallest roller coaster at 127 m above ground. The coasters mass is 1000 kg, what would the velocity of the coaster be at the bottom of the drop.

The answer is  a.first and third quarters 

Ithink it’s: light bounce if off a mirror

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.