A rope is fixed at one end and the free end is made to oscillate in one plane at right angle with the rope with frequency 15hz. the succession crest are 60cm apart. what is the speed of the wave?for what frequency the wave be 0.4m?

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.