11-09-2022
Chemistry

Answered

The efficiency of a machine is 60%. Calculate the work done by a student who used this machine to lift a load of 150 kg through a distance of 2.5cm.

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If+hydrochloric+acid+(hcl)+is+sold+as+a+28%+solution,+this+means+that+the+reagent+contains+28+grams+of+hcl+per+100+grams+of+the+solution.+what+is+the+mass+of+th