What is conduction? (4 points) a Transfer of heat through circular movement
b Transfer of heat through direct physical contact
c Transfer of heat through electromagnetic waves
d Transfer of heat through the movement of particles

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.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Describe the forces both attractive and repulsive that occur as two atoms move closer together.