If we rub a rubber rod against a piece of fur the rod gains a negative change. Why does the rod have a negative charge?

because the rod takes electrons from the fur when rubbed across it

that would be because of both gravity and friction. so     c

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19