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What is meant by the age structure of the population? why is it relevant for economic development and growth​ ......a rough edit by me^_^"MORNING BTW ​

Answer»

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 contactExplanation:it is good



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