Brainlest if answered right

most automotive pistons contain piston rings.

a. three
b. two
c. one
d. four

In pqr m< p=60 m< q= 30 and m

Athe top of a hill, an athlete on a skateboard has x joules of mechanical energy. how much mechanical energy will she have at the bottom of the hill? ignore the effects of friction.

An unknown substance has been shown to have weak covalent bonds. which of the following is most likely a property of this substance? a. high ph b. high conductivity c. low melting point d. low flammability