Question

simplify .Please show each step
$(( \frac{1}{3} ) ^{ - 2} - ( \frac{1}{2})^{ - 2} ) \div ( \frac{1}{4} ) {}^{ - 2}$
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Answer 1

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.