I will mark brainliest if your answer is correct!

The electromotive force (∈) = 2 V

Given

I=2 A

t = 30 s

E = 120 J

Required

The electromotive force (∈)

Solution

The electromotive force : the potential difference between two electrodes in galvanic cell

Can be formulated :

E = energy, J

Q = charge , Coulomb = i.t

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.