Quote:
BTW ... and Im surprised you didnt catch it.
I had the calculation wrong.


Paul, I am unlikely to spot your calculation error; I tend to trust your calculations. It’s only your reasoning that sometimes gives me problems.

My reference to two directions didn’t refer to directions of movement, but to directions of argument. You seemed to be saying on the one hand that the plane was moving relative to the ground, and on the other, that the balloon was not moving relative to the ground. Can both be true?

There never was nothing.