
20220928: Why Is 1/137 One of the Greatest Unsolved Problems In Physics?
 04:17: And the orbital speed of an electron in the ground state of the Bohr model of the hydrogen atom is 137 slower than the speed of light.


20220525: The Evolution of the Modern Milky Way Galaxy
 05:58: ... same merger, they should also have similar orbits. If their orbital speeds are even slightly different, they may have drifted to ...


20210609: Are We Running Out of Space Above Earth?
 01:45: ... while a loose screw or paint chip may not be all that scary on earth, at orbital speeds of 7 km/s they can carry as much energy as a ...


20181206: Did Life on Earth Come from Space?
 00:37: ... ahead to get to the nearest stars a rock traveling at the sun's galactic orbital speed of 30 km/s would take several tens of thousands of years but real ...


20150812: Challenge: Which Particle Wins This Race?
 00:59: ... Newtonian gravity, you can work out an expression for the orbital speed of this particle in terms of the mass and radius of the planet, or in ...
