When you take your coffee with you it will still be the cold coffee you have. If you go back and fetch the hot coffee you have a second to the one now. I’d generate a whole new universe and would require at least the energy of the mass of that additional coffee. E=mc² – calculate much energy that’d be.
When you take your coffee with you it will still be the cold coffee you have. If you go back and fetch the hot coffee you have a second to the one now. I’d generate a whole new universe and would require at least the energy of the mass of that additional coffee. E=mc² – calculate much energy that’d be.