A 1.5 kg ball strikes a wall with a velocity of 8.9 m/s to the left. The ball bounces off with a velocity of 7.7 m/s to the right. If the ball is in contact with the wall for 0.19 s, what is the constant force exerted on the ball by the wall

78.6 N

Explanation:

Considering the change in kinetic energy is equal to force*time then knowing that kinetic energy change is given by

where m is the mass, v is velocity, subscripts f and i for final and initial respectively, f for force and t is time

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.