Which two pieces of evidence support the conclusion that the total amount of energy in a closed system remains the same? The car's engine makes sounds as it runs.

The car remains full of gasoline if its engine stays off.

The car's engine gets hot as it burns gasoline.

The car uses more gasoline as it goes faster.

A,C

Explanation:

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.