Two objects, A with mass of 3.0 kg and object B with mass of 1.0 kg, move on a frictionless horizontal surface. Object A moves to the right at a constant velocity
of 5.0 m/s, while object B moves to the left at a constant velocity of -2.0 m/s.
They collide and bounce off one another (a perfectly elastic collision). Object A
is now moving to the left at -2.0 m/s,

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.