4. If a book falls off the kitchen counter and hits the floor 0.51 seconds later, how tall is the counter and how fast would the book be traveling when it
hits the floor? Assume the book fell at a rate of 9.8 m/s2 (acceleration due
to gravity).

the part of the wave he is travelling on is the crest

yo yo yo its papaguy in the house lol

okay, ima .

um it shows links to uh so kinda microsoft website is that were ima go or no? ?

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.