How can absolute zero exist if Einstein proved that mass and energy are related in E=mc^2? Shouldn’t that mean that anything with mass has energy?

Question

How can absolute zero exist if Einstein proved that mass and energy are related in E=mc^2? Shouldn’t that mean that anything with mass has energy?

In: 2

Answer 1

Absolute zero is temperature, so it’s just the motion component of energy. The potential energy locked away in the mass itself isn’t part of the calculation.