Who was the first American to orbit earth?
John Glenn aboard Friendship 7
Space quantization of elctron orbits ?
The values of theta that represent the angle b/w orbital quantum no. (l) & magnetic field direction can never by pi or 0 deg as then the magnetic quantum no . will have non integral values & and also the direction of orbital quantum no . & magnetic field will be parallel which means the electron will have circular orbit which is not possible as a particle under the action of a central force field has elliptical orbit . No cone around the magnetic field will be traced out . Is my reasoning correct ??
Did the Russians win the space race?
By most accounts, yes. The only really significant US first was putting a man on the Moon and that wasn't so much a race because it wasn't an aim of the Russians. After beating the US to putting men in space they concentrated on space stations instead. The International Space Station does not owe it existence to anything NASA did but the decades of experience the Russians accumulated with Mir and the various Salyut stations.