A heating curve is a graph that shows the temperature change of a substance as thermal energy is introduced.
True
False

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied. true or false

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation