Starting from rest, a 5.0 kg block slides 2.5 m down a rough 30.0 incline in 2.0 s. Determine the following
a. the work done by the force of gravity
b. the mechanical energy lost due to friction
c. the work done by the normal force between the block and the incline

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.

it is b. absorbs thermal energy