a car's efficiency is only 13 percent. list two things that car manufactures do to improve a car's efficieny

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

This is the substance(s) formed in a chemical reaction.

The items in the following list are all units of matter. which is the smallest unit that retains the properties of the matter? a.) atom b.) compound c.) electron d.) element