How long will the ball be in the air if the cliff is 120 m tall and the ball falls to the base of the cliff?

For 5 s the ball will remain in air.

Explanation:

Given:

Displacement of the ball is equal to height of cliff,

Acceleration of the ball is acceleration due to gravity,

Assuming the ball is dropped from the top.

Hence, initial velocity of the ball is,

Let 't' be the time the ball takes to reach the base of cliff.

Now, we have to use the Newton's equations of motion that relates displacement, initial velocity, acceleration and time.

So, we use the following equation of motion:

Plug in the given values and solve for 't'. This gives,

Therefore, the time till the ball is in air is approximately 5 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.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s