A. allow the compressed air into the building's pneumatic control systems. O B. remove moisture from the air. O C. allow injected lubricant to congeal on the vanes of the tools. O D. cool the superheated compressed air. Mark for review (Will be highlighted on the review page) Next Question >>

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

so easy. just google the electromagnetic waves and it’ll pop up.

snell's law

refractve index = sin incidence / sin refraction

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.