All Questions
11
questions
2
votes
3
answers
149
views
Would a gyroscope have solved the longitude problem?
So I was thinking about the longitude problem, which was the problem of determining the longitude at sea. It caused great problems in sea navigation. See: https://en.wikipedia.org/wiki/Longitude#...
- 2,035
27
votes
6
answers
16k
views
Does gravity get stronger the higher up you are on a mountain?
So I saw this article stating that gravity is stronger on the top on the mountain due to there being more mass under you however I have read some questions other people have asked and most of the ...
2
votes
3
answers
171
views
Had the centrifugal force of the rotation of Earth in the past forced liquid, hot Pangea to be positioned near the Equator?
Had the centrifugal force of the rotation of Earth in the past forced liquid, hot Pangea to be positioned near the Equator? Maybe also a question for 'GSE' but if we deal with centrifugal forces and ...
- 1,815
7
votes
1
answer
631
views
How do we know the Earth's core is Molten with Seismology?
My current knowledge about how the core of the earth was discovered is the observation made from non returning/reflecting sonar signal when sent to deeper depths through the earth's crust/mantle. How ...
- 331
24
votes
11
answers
12k
views
Backyard experiments to falsify the Flat Earth theory [duplicate]
I recently became aware that the flat Earth theory still exists in the 21st century, and has colored the views of a friend of mine. Roughly speaking, the tenets are:
The Earth is a flat disk, with ...
- 371
2
votes
2
answers
136
views
Why are the cores of planets melted?
We all know that the core of Earth is in liquid form, as are most other planets as recently read.
Why is this the case? Obviously, high temperatures are the cause, but what causes the high ...
- 21
43
votes
8
answers
85k
views
If the gravity at the center of the Earth is zero, why are heavy elements like iron there?
If gravity is zero at the center of the earth, why is there a core of heavy elements, such as iron?
Alternate question for the opposite hypothesis:
If gravity is greatest at the center of the earth,...
- 449
1
vote
1
answer
1k
views
What equations/constants were used to calculate the Kármán Line for Earth?
I am interested in how the original value of ~100 km was calculated for the Kármán line of earth. What equations and constants would need to be used to reproduce this value?
Note: By constants, I'...
- 113
10
votes
4
answers
3k
views
How do we know that Earth is not perfect sphere?
I've just read here that:
Equatorial radius = 6378.16 kilometers. Polar radius = 6356.78
kilometers, so the difference in circumference is 71.1 kilometers. It
is not a perfect sphere, but kind ...
- 213
39
votes
5
answers
34k
views
Would you be weightless at the center of the Earth?
If you could travel to the center of the Earth (or any planet), would you be weightless there?
- 543
11
votes
6
answers
10k
views
What sustains the rotation of earth's core (faster than surface)?
I recently read that the earth's core rotates faster than the surface.
Well, firstly, it's easier to digest the concept of planetary bodies, stars, galaxies in rotation and/or orbital motion.
But, ...
- 1,187