10.if zak is traveling at a velocity of 34.8 m/s and he increases his speed to 214.3 m/s over 20
seconds, what is his acceleration?

8.975 m/

Explanation:

Travel starting velocity (u) = 34.8 m/s

Achieved (final) velocity = 214.3 m/s

Travelling time(t) = 20 s  

we know that, v =u +at

                          ; where v= final velocity

                                       u=start velocity

                                       a=acceleration

                                       t=time

Therefore,

       His acceleration,     a = (v-u)/t

                                           =(214.3-34.8)/20

                                           = 8.975 m/

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.

measuring things 1 litre of water