You see a train that is moving away from you and sounding its whistle at a constant frequency. What happens to the
wavelength of the sound you hear?
[THE WAVELENGTH INCREASES]

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

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

80cm/s.

24cm/s.

53.3cm/s.