Fig. 5-8:
T1= 400K
T2= 300k, T3= 200K
The circle represents a reversible engine. During some integral number of
complete cycles the engine absorbs 1200 J from the reservoir at 400 K and performs 200 J
of mechanical work. (a) Find the quantities of heat exchanged with the other reservoirs,
and state whether the reservoir gives up or absorbs heat. (b) Find the change in entropy
of each reservoir, (c) What is the change in entropy of the universe ?

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

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.