an 87 KG object travels at 22MS west it collides head-on with a second object traveling 12 MS east after the collision both objects at rest calculate the mass of a second obje

when it gains or loses electrons

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