All Questions
Tagged with earth estimation
82
questions
2
votes
3
answers
297
views
Is it possible to estimate the 23.5° tilt of Earth's axis?
Using the value of the precession of Earth's axis in 25,800 years and the value of Earth's radius, mass, moment of inertia etc., would it be possible to calculate/estimate that Earth's axis must be ...
- 6,841
1
vote
2
answers
486
views
If everyone on Earth jumped at the same time, is it possible to steer the Earth?
Newton's third law states that in every action, there is a equal and opposite reaction.
When we jump, we exert a force on the ground and the resultant force upwards propels us up into the air. However,...
- 41
0
votes
2
answers
97
views
Which way might commercial fusion power affect the earth's energy balance?
The ITER fusion-energy project might prove the feasibility of commercial fusion-energy generation by mid-century.
This would be a comparatively clean method of energy generation, and subject to ...
- 1,107
45
votes
10
answers
12k
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Why can't the Earth's core melt the whole planet?
Earth core temperature is range between 4,400° Celsius (7,952°
Fahrenheit) to about 6,000° Celsius (10,800° Fahrenheit).
Source
Why can't the Earth's core melt the whole planet? In other words, what ...
- 567
1
vote
1
answer
282
views
Energy required to tilt Earth’s axis by 90 degrees? [closed]
How much energy would be required to tilt Earth’s rotation axis in such a way that what is now poles would be where to equators are relative to Sun and vice versa?
- 383
0
votes
1
answer
95
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Solving global warming by moving Earth closer to Mars
One way to reduce global warming is to get our planet farther away from the Sun.
If we placed a couple of thousands of SpaceX's Merlin rockets upside down in the tropics or Sahara i.e. somewhere where ...
- 131
0
votes
1
answer
120
views
How much energy from the Sun could we get if we use Jupiter as a gravitational or atmospheric lens?
How much energy (watts) from sunlight could arrive to the focal point if we use Jupiter as a gravitational lens? and if we use it as an atmospheric lens by using refraction?
How far the focal point ...
user277436
1
vote
4
answers
516
views
Can we stop the Earth from spinning?
When we walk on the ground, we push the ground backward and hence the ground pushes us forward and we change our position. The effect of our force on the Earth is very minute (literally negligible) ...
- 8,230
0
votes
0
answers
463
views
How much time dilation are we experiencing here on Earth? [duplicate]
We experience time dilation from speed and gravity, but we are in more than just the Earth's gravity field, but also the sun's and the galaxy's gravity field and we are both spinning at 1,670 km/h, ...
1
vote
1
answer
64
views
How much the Earth atmosphere oscillates due to Moon tidal force and does this produces winds?
As there is the tidal force of the Moon exerted on the Ocean water I supose there must be some force acting to the Earth's atmosphere. So when the atmosphere starts falling down as the Moon is ...
- 2,255
9
votes
1
answer
751
views
Does Earth's Gravitational pull increase with time?
Gravitational field depends on mass ($g = \frac{GM}{r^2}$) and every year many outside cosmic objects like asteroids or tiny object are hitting earth. So I think may be in a very microscopic amount ...
- 291
-2
votes
1
answer
140
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How high can you jump (at the corner) on Cube-Earth?
I have read this question:
Is the force of gravity always directed towards the center of mass?
And G. Smith's answer lists a site where they specifically talk about this case mathematically.
https:/...
- 29k
4
votes
1
answer
238
views
Would a 1km edge length solid tungsten cube sink through the Earth crust?
This question was inspired by this question on worldbuilding SE. Suppose you have a giant cube with $1$km edge length made out of pure tungsten and you put it somewhere on the ground. This is the size ...
- 163
2
votes
1
answer
1k
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What would the surface temperature of the Earth be without the Sun? [closed]
If the Sun would not heat the earth, and never had heated it in the past,
its surface would only be heated from the inside.
What would be the current temperature of the surface?
- 3,901
0
votes
1
answer
104
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Black hole on Earth, 1 foot in diameter [duplicate]
If a black hole 12 inches in diameter were situated (say) 10 metres off the ground, what would happen?
And how long would it take to devour the earth?
user102490