Which of the following is true about poles on magnets? A. North Pole attracts South Poles. B. North Pole repel South Poles. C. North Poles attracts north poles. D. Both B and C are true

low freq = 100 mhz

low wavelength =101.7m

length = 3x10^8/freq

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

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