906
Physics Relativity Level: High School
On the starship MacGregIV , Which travel at 0.90 c , dinner is served between 8:00 pm, and 8:45 pm according to the clock on the ship . How long is dinner served according to stationary observers on Earth watching the ship on a video monitor ?
899
Physics Relativity Level: High School
The K^0 particle decays according to the equation K^0->pi++pi- . If a particular K^0 decays while it is at rest in a laboratory , What are the kinetic energies of each of two points ? (The rest mass of the K^0 is 497.7 MeV/c^2)