The brain is not a muscle, like the heart, that can be worked and built. Which BEST explains why a consistent exercise regime has a positive impact on the brain?
ОА. .
Exercise generally requires a lot of thinking.
ОВ.
Exercise can eliminate all of the impact of stress.
OC.
Exercise helps maintain and create pathways in the brain.
OD.
Exercise is the only way to moderate the hormones that control the brain.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

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.