All Questions
Tagged with earth estimation
82
questions
3
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1
answer
221
views
If the Earth stopped spinning, how long would it take before it had gone from oblate to roughly spherical?
I know that because of the centrifugal force of earth's spin, it is not entirely spherical. According to wikipedia, earth's equatorial bulge is roughly 43 kilometers. So how long would it take for the ...
- 141
2
votes
3
answers
5k
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Why doesn't the Earth's magnetic field affect electronics?
Why doesn't the Earth's magnetic field affect electronics in the same way that a magnetic field affects/exerts a force on a wire with a charge at a perpendicular angle? Isn't that why electric motors ...
- 141
7
votes
2
answers
1k
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Does Earth experience any significant, measurable time dilation at perihelion?
Is there any measurable time dilation when Earth reaches perihelion? Can we measure such a phenomena relative to the motion of the outer planets?
- 79
48
votes
9
answers
21k
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Why is air not sucked off the Earth?
People said outside earth is a vacuum. But the air does not get sucked from the Earth's surface. Some said it is due to gravity and some said the speed of air molecules are not high enough to escape....
- 609
1
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1
answer
203
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Would a mini-blackhole collision with Earth cause heating? [duplicate]
Let's forget about the probability of this event. I am a mad scientist on the Moon, I created a micro black hole of the diameter $r=0.5cm$. I have to be fast before it evaporates due to Hawking ...
- 272
27
votes
2
answers
8k
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How much additional mass does the Earth gain each day from solar radiation?
According to this answer, energy has some (minimal) mass associated with it. Therefore, when lots of energy hits the earth (such as solar radiation in a 24 hour period) shouldn't the earth gain some ...
- 441
9
votes
4
answers
9k
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Why doesn't the heat of the Earth's core diffuse to the surface?
The Earth has a crust, mantle, outer core and the inner core with each one getting hotter than the next. How come, over millions and millions of years, the heat that is at the center of the Earth hasn'...
- 309
4
votes
2
answers
296
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How much mass must Earth lose to lose its Moon?
Maybe I am wrong about the basic concept here, but for my curiosity: how much mass would need to leave the Earth (like satellites and rockets) to create an imbalance between the Earth and Moon so that ...
- 215
4
votes
1
answer
515
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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
2
votes
3
answers
3k
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Can humans control rotation of the Earth?
I'm a class 12th student and this thought just struck me from nowhere.
Assume a situation where every human on this planet turns towards west. All of them start walking simultaneously in west ...
- 131
2
votes
1
answer
140
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Is it possible to 'push' a path to the Earth's core?
This may very well be a question for Earth Science SE, but as it is very hypothetical, maybe pure physics is more appropriate...
Question:
Imagine we have have a wedge that tapers down into an ...
- 131
14
votes
1
answer
1k
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How much energy does the Earth absorb when a gravitational wave passes through it?
I understand that gravitational waves pass quite freely through massive bodies.
Quoting http://www.ligo.org/science/GW-Potential.php:
Gravitational waves will change astronomy because the universe ...
- 243
0
votes
1
answer
195
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If the Earth were a pool ball, could I feel mountains? [closed]
If the earth (12,742 km diameter) were scaled down to the size of a pool ball (61mm diameter), the mountain ranges would still exist, obviously. But would a typical human be able to feel those ...
- 1,057
1
vote
1
answer
347
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How destructive would a small black hole be on the surface of the Earth?
Say a black hole with the diameter of around 200 meters or so was formed on the Earth's surface, how much damage would it cause?
- 13
3
votes
2
answers
2k
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What exactly will happen if a small planet collides with Earth?
This is a video of a simulation of Ceres (a dwarf planet) hitting Earth at 2000km/s.
What strikes me the most, is how fast the shockwave is moving. It takes about 6 minutes for the shockwave to pass ...
- 1,270