According to Einstein's mass- energy relation,
A) a stretched rubber band has slightly greater mass than the same rubber band when unstretched.
B) a heated object has slightly greater mass than the same object when it was cooler.
C) Both of the above.
D) None of the above.

Question

Quizplus · Accepted Answer

According to Einstein's mass-energy equivalence principle (E=mc²), energy and mass are interchangeable. A stretched rubber band has more potential energy, and a heated object has more thermal energy, both resulting in a slight increase in mass.

According to Einstein's Mass- Energy Relation