Which of the following is the best thermal insulator?

a.) air
b.) water
c.) metal
d.) stone

i’m torn between a and b. i’ve asked many and people say a, but i asked my science teacher and she said b. and also i’ve researched and on answers. com also says water is the better insulator..but idk i’m conflicted! apex

Examine the nuclear reacti why is this classified as a nuclear reaction rather than a chemical reaction? it is not balanced. a new compound is formed. a change has occurred in a nucleus. a new element has been formed.

The law of entropy can also be called the law of increasing disorder, but this law seems to contradict the existence of living organisms that are able to organize chemicals into organic molecules. prepare for a class debate on the validity of the following arguments: a. living things are not subject to the laws of thermodynamics. b. the increase in the universe's entropy due to life processes is greater than the decrease in entropy within a living organism.

For two variables in a direct proportion, what is the result of doubling one variable?