The same gravity that pulls the surface of the earth in also pulls out at a certian point [gravitational equalibrium]. centrifugal force causes thicker section on the equator thus thinner on the poles other wise you would weigh many times more on the poles.
2007-05-30 05:56:34 · 9 answers · asked by james h 2 in Science & Mathematics ➔ Physics
Start digging. And don't forget to recharge the batteries in your videocam. And take a water bottle. You are going to get hot down there!!
2007-05-30 06:05:29 · answer #1 · answered by Cathy K 4 · 0⤊ 0⤋
This doesn't make any sense at all.
Gravity does not "pull out." The earth bulges (and only slightly) at the equator because the earth is rotating and inertial forces normal to the axis of rotation exist in greater quantity there.
If the earth is hollow, I'd like to know what the inner crust is made of. That must be some strong stuff. It's a good thing nuclear testing, earthquakes, etc., don't just detach portions of the crust and send them hurtling toward the inner abyss.
Never mind how much trouble we'd be in if the crust sprang a small leak and the ocean and atmosphere drained inside the earth. That would make life up here difficult.
2007-05-30 14:29:23 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The previous note has it right on gravitational equilibrium. Of course there is tremendous pressure at this region from the surrounding material, even if the earth's own gravity "nets out" to zero in this area. There is no vacuum or hollow area there. It is solid iron. Hot, high pressure, solid iron.
Centripetal force does, in fact, cause a slight thickening at the equator. It is called "flattening." See source list, below. However, the effect is quite small -- only 0.335%. Also, consider that the same centripetal force which causes thickening at the equator would also be trying to fling you off (also not a strong enough effect to counteract gravity) and that this force reduces as you move toward the poles. Interesting question is if the gravitation effect of flattening is balanced by centripetal force.
You can lookup info on the "geoid" (also see source list, below) to learn about variations in the Earth's gravitational field. You gotta love Wikipedia for stuff like this.
2007-05-30 13:29:48 · answer #3 · answered by Anonymous · 1⤊ 0⤋
According to Captain Robert Falcon Scott's journal, he travelled something like a thousand miles south of the South Pole. That's a pretty extreme excuse for being late to claim bragging rights for first to reach the pole.
Due to competition among nations to claim bragging rights, the U.S. Navy decorated him and kept his journal secret as long as possible. Scott was a publicity hound who cared nothing about the truth. He also lied about having flown to the North Pole, and was decorated for that, as well.
Sorry, I'm having no luck finding my sources.
2007-05-30 19:34:27 · answer #4 · answered by Anonymous · 0⤊ 0⤋
You can probably find some crackpot site that says the earth is hollow. Try a search. Gravitationl equilibrium says gravity is zero and not pulling out
2007-05-30 13:01:12 · answer #5 · answered by Gene 7 · 3⤊ 0⤋
Dig a hole and yell into it and count how long it takes for the echo to get back to you.
2007-05-30 13:05:09 · answer #6 · answered by XOUT 4 · 0⤊ 0⤋
Ask those who think the earth is flat.
2007-06-02 13:30:42 · answer #7 · answered by johnandeileen2000 7 · 0⤊ 0⤋
A mental hospital, most likely.
2007-05-30 13:04:18 · answer #8 · answered by 2007_Shelby_GT500 7 · 2⤊ 0⤋
The short answer is: you can't, because it isn't.
2007-05-30 13:03:58 · answer #9 · answered by Anonymous · 3⤊ 0⤋