Wrong.
I know what it looks like.
Then, to quote you... "Show us!"
That is the real look of the earth.
You seem to have problems understanding the question. WHAT is the real look of the earth?
What you showed us in your video isn't the "real look"... you already conceded that.
So WHAT is it? Show us.
You nitpicking on why I never used a circular map of my own, proves nothing.
I am "nitpicking" why you chose one shape, when you yourself say that this isn't the shape.
What's the difference? I shrink the map, it fits. Then I fill in details on the edges.
The difference is if this "map" is "spatially accurate", as you called it, or not.
But I've never been to the edges (as yourself) so how would I know?
Just a few sentences earlier, you said that you do know how the earth looks like... now you say you don't because you haven't been "to the edges". So what is it?
You agree the edges exist, you just don't agree it ends there.
Not at all. I do not agree that edges exist on the surface of the earth. That's kind of the point.
That's just basic geometry. The surface of a sphere is
finite - meaning it has a specific size - but also
unlimited - meaning that regardless of the (2D) direction you move, you will always stay on that surface.
Don't bother about obstacles, just head west and burst out east. Simple.
Again, you seem to have problems with the visualization of your "real" earth. I asked you this several times before: where do you place your "east" and your "west"?
Is the map you posted in #205 where you think the "edges" are?
How about this map?
You said you haven't been to "the edge". So how would you know where they are?
(Freodin: "How do you know that driving at 80mph is not the same as driving at 5mph?")
Drag force, resistance, inertia...etc.
Thank you for being that elaborate. The "etc" is really helping.
Let's see.
Drag forces and resistance are relevant when you move relative to - and through - a "stationary" medium. If there is no relative movement, you won't experience these forces.
Easy testable observation: board a train. It will certainly move a different speeds, even in the range from 5 to 80 mph. See if you experience any kind of "drag forces"
inside the train. (Hint: you won't).
Inertia is how resistent objects are to
changes in their velocity. If you move at a constant linear speed - regardless of 5 or 80 mph - there is no change in velocity... and inertia doesn't do anything.
It cannot tell you anything about your velocity, it can only tell you about your acceleration.
There are indeed "et ceteras".
You can gauge your velocity visually. But that requires knowledge about the spatial relations and correct measurements of your visible surrounding.
It works quite well when driving, for example - because you have certain experiences about the size of the objects you see. But it doesn't work when you don't have this visual clues... for example on the open sea, or in the air.
You can use other indirect means. You can estimate your velocity by the sound of your propulsion or by the vibrations of your vehicle. But that again is dependent on your experiences in this regard, and the limits of your means of movement.
An old small car on a bad road may shake heavily at low speeds... a large passenger plane in calm weather will give you a smooth ride at very high speeds.
So, basically, you don't have any means to
directly experience velocity. There is no direct difference between 80mph and 5mph.
But, ok, you asked for math. (Forgive me if I will mostly use metric units for this... the math stays the same, but I won't be bothered to do all the transformations between inches and feet and miles.)
Let's see if we can find out the relation of "speed" to "dizzyness".
Do you have a chair that can rotate? Sit on it. Spin it around. Faster. Let's say you manage one revolution every two seconds. That's achievable and not even too fast.
Do you get dizzy? I bet you do!
So... how fast are you going, linear-wise?
Obviously you are not going anywhere... you are sitting smack-bang on the center. But your ears, where your sense of motion is comming from, are slightly offset, so you do "feel" the movement.
Let's say your ears are something about 4 inches from the center of rotation, about 10 centimeters. That means they spin in a circle with the circumference of 4in*2*PI... that's about 25 inches, or 63 centimeters.
You are moving 63 cm every 2 seconds. That's 1.89 m per minute. If you kept that up for an hour, your ears would have travelled the distance of not quite 1.2 km, or about three quarters of a mile.
So your "speed" would be 0.75 mph. That's not very fast, is it? And yet you get dizzy.
Too slow, you think? Ok, let's crank it up. Do one full rotation every second.
The math is easy... it's a simple linear relation.
Your speed is now 1.5 mph. Still not very fast... but I hope you can keep your breakfast in.
Want to go faster? Double the rotations! Two rotations every second. Hold on to your pants, pal!
We are now at a speed of 3 mph. That's about normal walking speed! Do you get dizzy while walking? (If you do, contact a doctor, urgently!)
Now, when you have stopped throwing up, let's take a short ride. Standard US town limits. 30 mph. That's ten times as fast as your ears spun around!
Do you feel dizzy? No?
Want to go faster? Let's take the highway. Or even better, take a hop over to my place and we can hit the Autobahn. Want to go 100mph? 120? 150? 175? Let's rent a nice Mercedes and test it out.
Do you feel dizzy?
Hey, when you came to visit me, you took a plane, right? How fast do you think this iron bird went? 500, 550 mph? Did you feel dizzy, or did you rest comfortably in your seat and enjoyed the meal?
See... somehow it is not the linear speed that you feel and that makes you "dizzy". You can go very very slow... and feel it hit you like a turbine. And you can go very very fast... and don't feel a thing.
Because it isn't the speed that matters... it is the change in velocity, which in the case of rotations is based on the
angular speed, not the
linear speed. And the angular speed of the earth is only 360° per 24 hours.