A substance is made up of slow-moving particles that have very little space between them. Based on this information, what can most likely be concluded about this substance?
It is not a gas because its particles do not move continuously
It is a gas because its particles move continuously in a straight line.
It is not a gas because its particles do not have large spaces between them.
It is a gas because its particles move in many different directions.

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?

How many grams of c3h8 is needed in the reactants to produce 10.5 mil of h2o

Two changes are described below. a green banana turns yellow and ripens. a layer of rust forms on an iron nail. which statement is true about the two changes? a) both are chemical changes because new substances are formed. b) both are physical changes because only the physical state of the substances change. c) a is a physical change due to a change of state, but b is a chemical change because new molecules are formed. d) a is a chemical change due to a change of state, but b is a physical change because new molecules are formed.