(“A” refers to the area of the engine throat.)
When the rocket reaches space, and the exit pressure minus the ambient pressure becomes zero, the equation becomes:
f = m exit V exit
Do you know what kind of equation is this? You can do some research and come up with an answer but does that make you really knowledgeable? Matter of fact, does that make me knowledgeable? Because I don't know anything about it. I have just copied and pasted this piece of information from an article released by NASA. I can say that this is a formula for launching the rocket in the space. But not having experience in this section I really can't tell what does what.
It has nothing to do with trading but I am just trying to make a point.
I can write an article by reading something on the internet and not knowing what it actually does. Everyone can share a piece of knowledge but experience is hard to gain.