5. If a truck goes 30 miles in 30 minutes, what is its average speed?

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Why are pipes bursting in the in extremely cold weather?

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.