Arunner at a track meet completes exactly one lap around a 400 m track. what is the distance? what is the displacement?

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.

What produces wave a)sound b) heats c)transfer of energy d)vibrations

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?