Answer:
12
Explanation:
A solar eclipse occurs when the moon in between the sun and the earth. Since in reality, the moons orbit is inclined, this aligning doesnt occur often. But if the orbit of the moon were in the same plane as the earth orbit, and since the moon orbits the earth once a month, the three objects would align every month. This makes it 12 times in a year.
The answer would be a radio wave
Since exa = 10^18, 10^11 miners are 0.0000001 Emine = 10^-7 Emine.