At what height h above the ground does the projectile have a speed of 0.5v?
express your answer in terms of v and the magnitude of the acceleration of gravity g.

Explanation:

It is given that,

Speed of the projectile is 0.5 v. Let h is the height above the ground. Using the first equation of motion to find it.

Initial speed of the projectile is v and final speed is 0.5 v.

g is the acceleration due to gravity

Let h is the height above the ground. Using the second equation of motion as :

So, the height of the projectile above the ground is . Hence, this is the required solution.

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.