Sound is a Wave because it cannot travel without a medium.

Idon’t know how to solve this question

What is i fracture in the crust called when land move up, down or sideways

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.