Which event probably caused the end of the Paleozoic Era? a large asteroid

the extinction of the dinosaurs

the breakup of Pangaea

a series of volcanoes

The magnets are probably damaged or there not strong enough to attached to the refrigerator

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move. 

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.

B. products  hope it !