Which actions are evidence that a chemical reaction has occurred? check all that appl
a change in color
the formation of a precipitate
a clear liquid becoming cloudy
a change in shape
the formation of bubbles
the formation of smoke

Iwas going to ask that quesytion  sorry dude i dont  know : (    : /

An example of environmentally learned behavior is aggressive behavior, i grew up seeing many aggressive people in my life and a slowly started picking up those traits however i was able to call myself out and not give in to those traits.

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.