Q3. Compute the position and diameter of the image of the Moon in a polised sphere of diameter 20 cm. The diameter of the Moon is 3500 km, and its distance from the Earth is 384 000 km.
approximately

this is poiselle's equation from fluid mechanic in physics. mech eng

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