Athin rod of length l and mass m rotates around an axis that passes through a point one-third of the way from the left end.1) which of the following will decrease the rotational kinetic energy of the rod by the greatest amount? a) decreasing the mass of the rod by one fourth, while maintaining its length. b) decreasing the length of the rod by one half, while maintaining its mass. c) decreasing the angular speed of the bar by one half. d) each of the above scenarios will decrease the rotational kinetic energy by the same amount.

answera compound;

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.