There is no proof in science only math. I can measure still water in my bathroom tub against a ruler and I will not find any curve. The same could be repeated in a swimming pool and as I mentioned with longer distances with lasers. The onus is on you guys to demonstrate that something exists that is extraordinary. There is actually a colorful history of this very experiment in the 1800s I believe. Both sides thought they won it as I recall
The formula was created by observing gravity in action. Because of that we can predict it
For the same reason it's supposedly curves around the rest of the globe. Granted I recognize the length of a bathtub would have a very very shallow curve but technically it would be there.
That's a circular explanation. You created a formula that can predict its behavior, but you have not identified what it is.
It's true. And I take back actually measuring it because you're not. You can't directly detect gravity. You can only predict the behavior with a mathematical formula. And you have theorized what it is. Fine.
Yes technically it should. I'm not sure what that equipment would be or how it would be accomplished. The easier method would be to create a perfectly still semi-large body of water and use lasers. Like I said amateurs have been doing this over lakes with no detectable curve.
Look, the fact of the matter is that you can't directly detect gravity. You have a formula that works, and a theory about how it works. Fine. Be happy about it. But it remains that it is an invisible force that you believe is responsible for the way the whole universe works.
Of course, and radio waves and so on. But there is no machine that can create gravity, at least as far as we're aware of. And there is no instrument that can directly sense gravity like we have instruments that can directly detect sound radio and other electromagnetic waves.
This is where I say that you should step back. Everything about the spinning ball globe Earth is taken by faith because we can't sense any of it. We can only extrapolate and deduce by other means. I can hear sound and I can see light. And I can see other waves with instruments that are designed to detect them. There's nothing that we have personal access to in that regard in order to believe that we live on a spinning ball and that gravity exists
Wait a sec... I though you were claiming that water is perfectly level. Now you say that a very very shallow curve would be there. That's the water conforming to the curvature of the earth as in the calculations posted. You've just invalidate your claim for flat earth and validated globe/ball earth.