7. Two rocks are rolled down a hill at different speeds. At the bottom of the hill is a brick wall. Which rock will hit the brick wall with more force? 4 points. Rock 1 Rock 2 mass = 242 kgmass = 321 kg velocity = 24 m/s velocity = 20 m/s2 KE = 1/2m x v2 where m = mass and v = velocity. Please show your calculations.

answer: option c.

explanation:

d) physical means can be used to separate the components of air.

prndulum needs thread, weight clock to time swings

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.