Asa watches her mom rub soap on her finger to help get a ring unstuck. He thinks that the soap reduces friction. He designs an investigation to test his theory. He pills a weight across a board and records the force with a spring scale. He then puts soap on the board and pulls the weight again. Which of the following variables is Asa measuring?

3x + 2x = both people using the same measure of like 5x = x= 25 meters per second. 25ms. it takes them 4 seconds to

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n

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.