I didn't want to type all of this, so instead I showed proof and gave you the answer.
That would be position Y, as the northern hemisphere is tilted away from the sun.
10,000 units of momentum.
p=mv
20,000=m(2v)
10,000=mv
There is no such thing as an AC Generator, if its a generator, its DC. I think you are talking about an AC Alternator, in which case the answer would be -wrong answer, deleted-