Which does not represent a change in velocity? Group of answer choices

A person is riding a bicycle at 4 m/s west and decreases her speed to 3 m/s.

A plane is flying south at 600 km/h and then flies directly upwards before returning to the airport.

A balloon is floating up into the air at 1 m/s.

A bus is traveling west at 2 m/s and then turns a corner.

A balloon is floating up into the air at 1 m/s.

Explanation:

Velocity is the displacement divided by the time;

   Velocity =

It is a vector quantity that has magnitude and direction.

The choice that shows a change in direction is a correct specification of velocity.

A balloon floating up into the air at 1m/s shows no directional change.

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.