In water, it's drag. Exactly the same as air resistance
only hundreds of times greater.
Yes, the electromagnet still affects the compass needle.
(plato answer)
Answer:
If none of the ships are moving, the elapsed time for ship B will be the same Δt = 10s
Explanation:
If no ship is moving then the elapsed time between missiles for both ships will be the same.
On the other hand, if one of them (or both) were moving, then the relative motion of the ships would make Δt seem <em>smaller </em>if the ships were getting closer, or <em>greater</em> if they were distancing from each other.
