measure of the amount of matter
measure of the amount of matter in an object, measure of the amount of matter, what is the measure of the amount of matter, mass is a measure of the amount of matter
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measure of the amount of matter in an object
measure of the amount of matter
what is the measure of the amount of matter
mass is a measure of the amount of matter
measure of the amount of matter in an object, measure of the amount of matter, what is the measure of the amount of matter, mass is a measure of the amount of matter