Material from which of the following solar occurrences can reach earth, causing radio blackouts? a. coronal mass ejection b. prominence c. solar wind d. flare

A). Coronal mass ejection

Explanation:

The most powerful solar storms send coronal mass ejections (CMEs), containing charged particles, into space. If Earth happens to be in the path of a CME, the charged particles can slam into our atmosphere, disrupt satellites in orbit and even cause them to fail, and bathe high-flying airplanes with radiation causing radio blackouts.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6