Fifteen grams of a liquid plastic are frozen in a physical change that increases the volume. what can be known about the plastic after the change?

it will weigh more than 15 grams.
it will have an increased density.
it will still weigh 15 grams.
it will still have the same density.

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

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.

List the path of the respiratory system