What the center of the earth is composed of is not guesswork, it is applying the known rules of physics to the data and evidence we do have, to come up with reasonable conclusions.
you don't understand how science works. all that is conjecture, based on theories.
science states until I've actually proven it by experimentation does it become true.
please stop lying to people. because you either know this is true or you are ignorant of what makes truth.
The theory of gravitation is what enables us to safely build skyscrapers and bridges and flying machines.
Learn about it and many other things right here: https://www.khanacademy.org/
and the roman empire build many structures without knowing it, because it isn't necessary.
i've seen the aqueducts. they still stand today, and they knew nothing of gravity.
The ancient Romans understood specific gravity of different materials. They understood that water ran downhill. They understood that things have weight and fall to earth. So they knew how much strength a wall must have to support a certain weight. They understood the effect of gravity upon water. So they built very gently sloping water channels from water source to city. The effect of gravity upon water was necessary to make the aqueducts work. They didn't understand the force itself, but they well understood its effects. So they knew some things about gravity. They just hadn't quantified it into formulas.
It is our modern understanding of gravity that allows us to surpass what the Romans built.
gravity is simply an observed phenomenon. not sure what is so hard about that to understand.
it is literally the weight of things, which can be measured, what can't be proven, without astro-physics (which i say is just observed phenomenon again).
the force of gravity is just too weak to be measured. it isn't actually useful, you've taken the weight of things, applied it a fancy name 'gravity of materials' and pretend it means something, it doesn't.
i don't expect you to ever be scientific, you only do that when it suits your purposes.
The force of gravity is not too weak to be measured. It has been measured to extreme precision. This knowledge allows us to build skyscrapers, heavier than air flying machines, and direct scientific equipment all over our solar system.
You're first 2 statements say that gravity can be measured. You're 3rd statement says it is too weak to be measured. Being logically consistent is helpful when trying to argue a position.
dude, your just reading from a script.
we can do all that without your gravity.
you mean send rockets out to sea? please. we've been over this, nasa is a fraud.
we can measure the weight, sure, there is something happening, but what we don't exactly know. nobody does.
do i need to link you degrasse again? jesus....
Weight = mass x the acceleration of gravity.
When you measure weight, you are measuring the effect of gravitational attraction on a mass.
No, we do not know the precise mechanism that causes gravity to work, but we know how to accurately and repeatably measure its effect. It works every time it is tested. that is what makes the study of gravity scientific, unlike every single flat earth theory.