All Questions
7
questions
0
votes
1
answer
464
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What are Love numbers and what is the Moon-Earth tidal quality factor?
I need to find the quality factor (ie. $Q = \frac{\text{energy stored}}{\text{energy dissipated per cycle}}$) associated to the Moon orbiting around the Earth. Looking around for this, lead me to the ...
- 914
0
votes
1
answer
129
views
How does gravity change nearing the core in free fall? [duplicate]
The Pole to Pole Mole Hole-
If there were to somehow be a cylinder going from the North to South Poles, all the way through Earth, then what would happen halfway down (The Core). If something fell ...
2
votes
1
answer
226
views
How do you calculate unified planetary precession incl. both GR and Newtonian contributions?
We know the theory of general relativity (GR) accounts for the illusive $43$ arc seconds of precession of the perihelion of Mercury. The calculation is well known and well studied. How does one ...
- 1,988
0
votes
1
answer
238
views
Does gravity act in the centre of the Earth? [duplicate]
If we we dig a hole from north pole to the south pole of the Earth and we throw a ball in this hole where would it stop? Will it come back on the surface or it will stop at the centre?
- 21
3
votes
2
answers
1k
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Why do we orbit around the sun instead of one the other stars?
I am still very new to many physics theories, however while sat in class today, a thought came to mind that I have not been able to answer from simple googling.
What is so specific about our sun ...
- 323
5
votes
2
answers
4k
views
How gravitation affects tides
I know that tide is caused by the gravitational pull of moon but what I don't know is how it affects water. I have actually these doubts.
Why does gravity of the moon creates tides only in water?
Are ...
- 1,037
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