1. How do satellites remain in orbit around a flat plane.
Satellites with sustained orbit do not exist. The signals picked up by them are from broadcasting towers or pseudolites.
2. How does atmosphere remain on the flat plane if it has no gravity. In fact, how does the atmosphere not stay contained in the flat plane in any matter?
There are a few different ideas regarding this matter. In the general model which posits dark energy, there exists a dark energy vector field (DEF) which prevents dark energy from interacting with matter on earth. This also keeps the atmolayer in place.
In McIntyre model, the Ice Wall increases in height toward the edge of the earth, and it is this containment which keeps the atmolayer in place.
If the earth is an infinite plane, as posited by John Davis, I would suppose the atmolayer is kept in place by the finite gravitational field caused by the earth's mass, and the fact that there simply isn't anywhere else it could go. As you move away from the sun's heat and over the Ice Wall, temperature and thus pressure begin to gradually decrease until near absolute zero is reached. Gravity and this pressure boundary on the infinite earth would most likely suffice to keep the atmolayer in place.
3. How come people can fly in one direction and cross the flat world.
If one were to use a compass, then all directions are relative to the North-South poles of the magnetic field. If one were to travel due east, for instance, this would result in travelling in a circle around the north pole. This is circumnavigation, and is certainly possible on a flat earth.
4. How come we can measure the depth of the world, and figure out that we have a molten core.
Because the earth is thick enough to have a core of molten lava.
5. How come we can produce shock waves on one side of the world and measure it on the other side.
Who said the shockwaves are coming from an antipodal region of the world? Instruments and those who operate them can be very deceptive.
7. How can gravity not exist when we can calculate and measure the gravity of small objects and apply as well as measure and observe the gravitational force in extreme small scale.
Under the General Model, apparent gravity is simply the upward acceleration of the earth at a rate of 9.8m/s^2. Under the Davis model, there is a finite gravitational pull generated by the mass of the infinite earth plane.
8. How come FET contradicts most of modern physics as we know it.
And "modern physics as we know it" can't possibly be mistaken? "Modern" science also posited caloric, frigidic, luminiferous ether, and bodily humours as well. These are all discredited.
9. How come we have a north and south pole at opposite polar ends if the world is flat
The magnetic field is the same as in the RET. The magnetic south pole is near the geographic north pole. The magnetic north pole is on the underside of the flat earth.
10. How come we can observe the flat earth
Because the earth is flat. This is self-evident.
11. How come you can observe the curvature of the earth in high altitude vehicles (IE: The commercial Concorde when it was still in use)
The apparent curvature is an optical illusion caused by perspective, and the apparent spherical nature of the earth plane from extremely high altitudes is due to the sun's light illuminating a portion of the earth's plane, giving the illusion of rising in a semi-spherical manner.
12. How come Space agencies exist
Some posit that they are a scheme to bilk the government for personal gain.
13. Why aren't other planets flat
Why don't zebras have flippers?
14. If we perpetually accelerate 9.8m/s upwards what is causing this
The universal acceleration is due to dark energy under the General Model. In the McIntyre model, it is caused by the universal accelerator directly beneath the earth.
15. How come the stars move across the sky in a fashion that supports a round earth
Because the motions of the heavens are mistaken for the apparent motion of a spherical earth. Other anomalies are caused by the distortion of light and other laws of perspective.
16. How come most of modern physics contradicts with the FE theory
Modern physics is mistaken.
17. How does most of modern astronomy, space travel, star gazing work when it relies heavily on the concept of a spherical earth, gravity, etc.
We can create a plethora of hypothetical models that conform to observable phenomena, but that doesn't mean that such a purely mathematical model is based in reality.
18. Why does summer in the arctic or antarctic suggest that the earth is spherical
Because you've misunderstood natural phenomena to support the RET.
19. How come only parts of the globe are illuminated at a time
Because the sun only illuminates certain parts of the earth disk at a time, in accordance with its seasonal cycles above the earth plane.
20. How come nobody has ever discovered this wall of ice surrounding the flat earth
Who says they haven't?
21. If the world is flat how come we've never observed this.
I'm observing it right now.