please estimate how many cosmic neutrinos are in the observable Universe. are there more or less photons than neutrinos?
Wednesday, April 22, 2015
Wednesday, April 15, 2015
Wednesday, April 8, 2015
Wednesday, April 1, 2015
planets are not pointlike objects and the total force in a gravitational field would need to be integrated over the planet's volume, i.e. the acceleration of the centre of gravity would need to be corrected by tidal forces. can you estimate how large that correction would be?
Eingestellt von spirou um 4/01/2015 12:00:00 AM