Second-order partial differential equations chap. 11 2. show that if the operator l[u] in (8.1) is moving coordinates hyperbolic and a 0, the transformation to x, = x-241, t'=t takes l into a multiple of the wave operator. (that is, the wave operator is another standard orm for a hyperbolic operator.)

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.

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.

its a circle not a square that's simple silly.

explanation: