tag: physics
10 proofs
An object moving at exactly 0.95c relative to a stationary observer experiences a Lorentz factor γ greater than 3.2.
Earth will lose gravity for exactly 7 seconds on August 12, 2026, causing 40 million deaths.
Sources: BGR (citing NASA spokesperson confirmation), Daily Galaxy (citing NASA statement on the hoax), NASA Space Place (NASA official educational resource on gravity)
Heavier objects fall faster than lighter objects even in a perfect vacuum.
Sources: NASA Glenn Research Center, NASA Science, Wikipedia: Equivalence Principle
Lightning never strikes the same place twice.
Sources: National Weather Service (NWS), NOAA National Severe Storms Laboratory (NSSL), NASA Spinoff +1 more
Local Cepheid-variable measurements of the Hubble constant exceed 72 km s⁻¹ Mpc⁻¹ while the 2018 Planck CMB inference yields a value below 68 km s⁻¹ Mpc⁻¹.
Sources: Riess et al. 2022 (arXiv:2112.04510), Riess et al. 2022 (ApJL 934 L7, IOPscience), Planck Collaboration 2018 (arXiv:1807.06209) +1 more
Quantum entanglement enables the transmission of usable information faster than the speed of light when the distant parties pre-agree on a measurement basis.
Sources: Wikipedia — No-communication theorem, Caltech Science Exchange — Quantum Entanglement, Wikipedia — Faster-than-light communication +1 more
The mean neutron lifetime measured in beam experiments is more than 1 second shorter than the lifetime obtained from ultracold-neutron bottle experiments.
Sources: U.S. Department of Energy, Office of Science, Quanta Magazine
The Schwarzschild radius of the Sun calculated via rs = 2GM/c² with 2022 CODATA values for G, solar mass, and c lies strictly between 2.95 km and 2.96 km.
Sources: NIST 2022 CODATA Recommended Values, IAU 2015 Resolution B3 (Mamajek et al. 2015, arXiv:1510.07674), Wikipedia — Solar mass (TCG-compatible GM☉ estimate)
The theoretical vacuum energy density from quantum field theory exceeds the observed cosmological-constant value inferred from Type Ia supernovae by more than \(10^{120}\) orders of magnitude.
Sources: Wikipedia — Cosmological constant problem, Wikipedia — Dark energy, CosmoVerse COST Action — Quantum vacuum: the cosmological constant problem
The twin paradox in special relativity can be resolved only by invoking general relativity and the acceleration of the traveling twin.
Sources: UCR Physics FAQ (maintained by John Baez), Wikipedia — Twin paradox, Scientific American +1 more