A bat flies toward a wall, emitting a steady sound of frequency 2020 Hz. The bat hears its own sound, plus the sound reflected by the wall. How fast, in m/s, should the bat fly in order to hear a beat frequency of 31.3 Hz? The speed of sound is 340 m/s.

c)as speed changes, wavelength and frequency change.

everything changes!

the answer is a. at the equator

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.