All Questions
Tagged with earth tidal-effect
51
questions
14
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4
answers
4k
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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.
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- 131
4
votes
1
answer
515
views
How far has Earth moved from its birth orbit?
It says earth is almost as old as 1/3 of the universe's age which would mean 4.5 billion years .
So how far has earth moved towards or away from the sun in these 4.5 billion years?
Now perfect ...
- 838
1
vote
3
answers
329
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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
2
votes
1
answer
247
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Why does Moon always poses the same face towards Earth?
If both Earth and Moon are rotating as well as revolving around some focus, shouldn't they have drifted out of phase with each other long ago? So, why do we always see the same side always?
- 25
0
votes
0
answers
109
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Do I weigh less during high tide? [duplicate]
Given weight = mass * gravity do I weight less during high tide and more when tide recedes?
My guess is weight = mass * gravity * gravitational pull of moon factor
- 125
-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 ...
2
votes
1
answer
113
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How did the Moon survive next to the Earth since earth and Moon came into existence?
What mechanism(s) prevented the gravitational effect of the earth on the moon from shattering the moon when it was closer to the earth than the Roche Limit some 4.5 billion years ago?
- 49
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votes
1
answer
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Does the Moon have rotation about its axis?
As I understand, the Moon is following Earth's curved space. If that's the case, shouldn't the Moon have no rotation if it's tidally locked, and only appear to have rotation?
If the Earth suddenly ...
- 161
7
votes
2
answers
2k
views
Can we get energy from the Earth's rotation?
Is there any way to harvest large amounts of energy from the Earth's rotation?
- 4,576
5
votes
2
answers
2k
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How does the Moon cause the tides?
I am considering the following question, but I can't quite figure it out...
I have looked up differential gravity, but I cannot derive the equation for the effect on Earth, and I haven't found any ...
- 3,997
18
votes
3
answers
3k
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I was told that if the Moon had a retrograde orbit, tides would have a faster rhythm. Why is that?
Would this be because tidal deceleration causing the Earth to spin faster or are there other actions in play that I haven't considered? Would the Earth even spin faster because of the tidal ...
- 283
8
votes
2
answers
6k
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How many hours will there be in a day 5,000,000,000 years from now?
It is known that the moon is moving away from Earth 2cm a year, and in doing so makes the days longer.
I want to know how many hours will have one day, when our planet is near its end.
- 1,108
9
votes
2
answers
1k
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Does the Earth's core have tides?
Does the moon produce a measurable tidal-effect on the Earth's (liquid) core? If so, how strong is it? Would it play a factor in other geological effects like earthquakes, volcanoes, etc?
- 393
21
votes
3
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How quickly was the Earth rotating 250 million years ago?
The Earth is slowing at a rate of $4.7\times10^{-4}$ miles per second every 100 years due to tidal forces of the moon.
See:
http://en.wikipedia.org/wiki/Earth%27s_rotation
http://imagine.gsfc.nasa....
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