Which is an example of a chemical reaction? a) tearing up your last science test. b) eating a antacid to calm your upset stomach. c) rubbing your hands together to warm them. d) pouring water on a cut to wash off the germs.

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.