How does the Doppler effect cause a siren's pitch to increase as it approaches you? A.
Sound waves are spread out, increasing wavelength and decreasing frequency.
B.
Sound waves are pushed closer together, increasing wavelength and decreasing frequency.
C.
Sound waves are pushed closer together, decreasing wavelength and increasing frequency.
D.
Sound waves are spread out, decreasing wavelength and increasing frequency.

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

elctricity and magnet is conversion to it

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.