Sound waves travel in air at room temperature with a speed of 343 m/s. The lowest frequency sound we can hear is 20.0 Hz. Find the corresponding wavelength

heat the gas and measure the pressure

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

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