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Answer:</h2>
Average atomic mass of an element is the sum of the masses of its isotopes each multiplied by its natural abundance
Heat energy is absorbed by the substance.
Newton's Second Law states:
The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the mass of the object.
since the net force and the acceleration ar directly proportional, as the net force increases the acceleration will increase.
hope this helps :)
Your going to have to take a picture or make a list of the substances so i know which are and are not a compound
The unknown medium would be glass
