Un arco viene teso nel centro applicando un forza F=200N. Calcolare la tensione della corda quando l'angolo alfa che essa forma con la verticale è di 25º.

this is a good question! i'll do some research and come back when i have the answer!

no. dot product   =0 when vecs at right angles

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

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr