Answer:
a
Explanation:
"where crests and troughs have their maxima at the same time"
Crests and troughs are 180 deg out of phase and when they have their maxima at the same time and place, their net contribution will be zero"
2.75x610km
1220+7.5x61
1220+427 ... just over
1647
Yes
There is a position that works better than this and that is switching the sides of the forks.
64N
32×2= 64N