All Questions
11
questions
20
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If the tidal bulge on the earth speeds the moon up, how does the moon move to a higher orbit?
I understand that the moon causes a tidal bulge on Earth, and this tidal bulge moves slightly ahead of the moon due to Earth's rotation.
When reading about why the moon is moving away from the Earth, ...
- 303
1
vote
2
answers
136
views
Will the moon ever proceed to lose its orbit and hit the earth?
Assume that the moon it orbiting the earth in a circular trajectory.
It will experience an acceleration directed towards the centre of the earth given by $\frac{GM}{R^2}$ where $G$ is the universal ...
- 335
0
votes
1
answer
60
views
If the Earth and the Moon were smaller, would moon tides be more or less intense?
If the Earth and Moon were smaller (and everything on them too, but keeping the same average density and the same "relative" distances, I mean... the same proportions!), would the tides ...
- 11
0
votes
1
answer
319
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NASA's explanation on tidal acceleration
I've found an animation in NASA's website, illustrating tidal acceleration effect between the moon and earth.
It's the forth animation from the top in this page:
https://moon.nasa.gov/moon-in-motion/...
2
votes
1
answer
88
views
Constant of integration in Equilibrium Theory of Tides
I am preparing an elementary derivation of Newton/Laplace's equilibrium theory of tides.
The derivation of the tractive force is understood, as is the derivation of the differential equation for ...
4
votes
1
answer
381
views
Expanding Moon's orbit and newtonian mechanics
the 2 body problem of earth and moon is suppose to be perfectly described by Newtonian mechanics / Kepler's laws.
How ever the moon's orbit is been moving away from earth in contradiction to the ...
- 1,447
14
votes
4
answers
4k
views
If water is essentially incompressible, why are there tides?
So recently we were taught in school that tides are formed because the moon 'cancels out' some of the earth's gravity, and so the water rises because of the weaker force. But if water is not ...
- 2,030
0
votes
2
answers
227
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What factors will make Earth re-rotate again if it stopped? [closed]
"What will happen if Earth stopped rotating?" have been answered multiple times with a lot of informative and interesting answers. Continuing this hypothetical question, I have another one in mind.
...
- 131
1
vote
3
answers
329
views
Would a non-rotating Earth collapse on the Sun?
If the earth stopped rotating on its axis, would this influence its revolution motion? In particular, could it collapse on the sun? I ask this because on the one hand I thought the two degrees of ...
- 1,793
-1
votes
1
answer
204
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if the Earth's rotation was slowed down, would it naturally speed back up as it was before? [closed]
Fact: The Earth is rotating on it's own axis every 24 hours.
Question: If, for some reason I won't specify the current speed of the Earth and could slow it down(say by 5%). Will it speed up again ...
8
votes
3
answers
13k
views
How long was a day at the creation of Earth?
Since the earth is slowing its rotation, and as far as I know, each day is 1 second longer every about 1.5 years, how long was an earth day near the formation of earth (4.5 billion years ago)?
I ...
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