Answer:
Explanation:
Yes, when we heat an object its mass increases. The complete equation is
E2=(pc)2+(mc2)2
And from this equation if a system has zero momentum (p=0), then it has energy E=mc2
When you heat an object the molecules or atoms begin to vibrate, rotate with more kinetic energy. But this doesnt increase the momentum of the system (the object is a system of many particles). Though the kinetic energy of the particles that make the system increases, the system is at rest (when you heat the object the object doesn't start moving). Hence, from the equation I wrote above the energy you provide get added as mass of object.
