query: How can the total amount of energy in the universe be zero?
positive_passages.docid: 146039
positive_passages.text: Is it always possible to define energy of a system?
negative_passages.docid: 53450
negative_passages.text: What's the avarage temperature of the Universe?
negative_passages.docid: 2073
negative_passages.text: Conservation law of energy and Big Bang?
negative_passages.docid: 67531
negative_passages.text: Universe being flat and why we can't see or access the space "behind" our universe plane?
negative_passages.docid: 95295
negative_passages.text: Is the Universe Past-Eternal?
negative_passages.docid: 119004
negative_passages.text: Proof of conservation of energy?
negative_passages.docid: 129234
negative_passages.text: Theory that gets rid of dark matter/energy
negative_passages.docid: 45283
negative_passages.text: Why don't virtual particles violate conservation of mass/energy?
negative_passages.docid: 80329
negative_passages.text: How is dark energy consistent with conservation of mass and energy?
negative_passages.docid: 117326
negative_passages.text: Why energy curves spacetime?
negative_passages.docid: 84458
negative_passages.text: What's the real fundamental definition of energy?
negative_passages.docid: 110232
negative_passages.text: Can an observed event in fact be of zero probability?
negative_passages.docid: 38151
negative_passages.text: Why is absolute zero considered to be asymptotical? Wouldn't regions such as massive gaps between galaxy clusters have temperatures of absolute zero?
negative_passages.docid: 127450
negative_passages.text: How can the electric potential be zero at a point where the electric field isn't, if that field can give a test charge kinetic energy?
negative_passages.docid: 29728
negative_passages.text: Does the vacuum in QFT have nonzero energy or not?
negative_passages.docid: 45625
negative_passages.text: Is energy content of a system different depending on the observer?
negative_passages.docid: 85582
negative_passages.text: Why aren't all photons virtual particles even in the "vacuum" of empty space?