physics of the Earth and its environment in space. Its subjects include the shape of the Earth, its gravitational and magnetic fields, the dynamics of the Earth as a whole and of its component parts, the Earth's internal structure, the generation of magmas, the hydrological cycle including snow and ...
33
votes
7answers
3k views
Why is the Earth so fat?
I made a naive calculation of the height of Earth's equatorial bulge and found that it should be about 10km. The true height is about 20km. My question is: why is there this discrepancy?
The ...
21
votes
4answers
979 views
Why does the sky change color?
Why the sky is blue during the day, red during sunrise/set and black during the night?
-2
votes
3answers
697 views
Electro Magnetic Waves can cause matter displacement?
After watching this video:
http://www.youtube.com/watch?v=j1jIjx0XF_U
The experience is made with a speaker that generates a sound wave or mechanic wave. Can you use this to establish a link to ...
12
votes
1answer
938 views
What would happen if the Earth was tidally locked with the Sun?
I'm thinking of writing a short story set on a version of Earth that is tidally locked to the Sun. I'm not exactly sure how to research the topic. Here's a number of questions about what would happen:
...
2
votes
2answers
1k views
Physics of tsunami: the relationship between wavelength, sea depth and the height of the water
If I understand correctly, when an earthquake occurs, energy will be transferred to the water, resulting in water waves. As the waves reach seashore, because the sea depth is getting shallower and ...
6
votes
2answers
1k views
How long does it take an iceberg to melt in the ocean?
This is a quantitative question. The problem is inspired by this event:
On August 5, 2010, an enormous chunk of ice, roughly 97 square miles (251 square kilometers) in size, broke off the Petermann ...
