What happens to the air bubble when the leafy shoot of the potometer is enclosed in a polythene bag

Aneutral atom must have the same number of neutrons and protons? no, they must have the same number of protons and electrons

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11