All Questions
Tagged with earth estimation
82
questions
6
votes
2
answers
291
views
Does life erode Earth's mass over time?
Since life converts matter to energy, and there's no natural process that does the opposite (aside from supernovas), does this mean that the mass of our planet is gradually diminishing? I asked ...
- 61
3
votes
3
answers
329
views
Comparison of clocks running at different heights in a gravitational field
I hope this question has not yet been asked. If so then please link me to the answer.
If I build an apparatus which, on flicking a switch, sends a light beam, a distance to a mirror, and reflects it ...
1
vote
1
answer
27
views
Do frame dragging affects falling object?
Imagine there is a tall tower erected at the equator, a pulse of light is beamed from the top of the tower to the ground. Do I need to consider frame dragging? After all the spacetime is being tucked ...
- 13k
0
votes
1
answer
120
views
Can gravity of planets besides Sun and Moon affect tides on Earth?
The tides in some places on Earth are over 50 feet. If the gravity from Venus had a ten thousandth the affect of the Sun and Moon on a 50 foot tide it would make a difference of one twentieth of an ...
- 481
2
votes
1
answer
72
views
Will a man acquire orbit if we suppose Earth is rotating fast enough?
if we consider that the rotation of earth is mush faster (30000km/h), so if a man standing on earth jumps 1 meter above will it acquire orbit if we ignore atmospheric friction
- 21
0
votes
2
answers
83
views
Why can't we feel Earth's acceleration? [duplicate]
The centripetal force on Earth is constantly exposing Earth to the acceleration. Why can't we feel this change of direction?
- 1
4
votes
1
answer
950
views
Energy needed to stop the Earth's inner core ---and its effects?
As you will most possibly know, a misreading of this paper by the media caused kind of a "panic" about how the Earth's inner core had stopped or even reversed its rotation and its "...
- 49
3
votes
2
answers
135
views
On the Melting of the Arctic Ice [closed]
I have read that:
Polar ice caps are melting as global warming causes climate change. We lose Arctic sea ice at a rate of almost 13% per decade, and over the past 30 years, the oldest and thickest ice ...
- 231
24
votes
4
answers
5k
views
Why is climate change triggering faster rotation?
On July the 29th 2022, the Earth finished its rotation about 1.5 milliseconds earlier than the entire 24 hours. Scientists link this to climate change, saying that a possible reason could be due to ...
- 1,638
1
vote
1
answer
76
views
Will angular velocity of earth be Affected By this? [duplicate]
If all the humans, animals, and all other beings came together to North Pole of earth, Will it affect the angular velocity Of earth in any means?
- 452
2
votes
2
answers
289
views
What would happen if a teaspoon of neutronium crashed through Earth's atmosphere? [duplicate]
Pretty self explanatory hypothetical. I realize this is probably an impossibility and maybe it'd be more likely to be hit by a small black hole or primordial black hole. I'm just curious, because we ...
- 31
7
votes
1
answer
582
views
What volume would the mass of Earth occupy in the core of the sun?
I was just wondering if anyone had computed this. I read that the pressure in the Sun's core is 3.84 trillion psi. Obviously the mass of an Earth-sized object in the core would be millions of times ...
- 175
7
votes
2
answers
1k
views
The effect of gravitational lensing during the lunar eclipse
During the lunar eclipse, the Moon turns into bloody colour while the shadow of the Earth is casting over the lunar surface. The red hue can be explained by means of the refraction of light and ...
- 670
27
votes
6
answers
16k
views
Does gravity get stronger the higher up you are on a mountain?
So I saw this article stating that gravity is stronger on the top on the mountain due to there being more mass under you however I have read some questions other people have asked and most of the ...
2
votes
2
answers
255
views
What is the difference of gravity between lowest tides and highest tides?
I know tides are due to gravitional gradients so the difference of gravity between places does not need to be big in order to generate tides.
Regardless, what difference are we talking about, ...
- 3,236
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
views
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
views
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
views
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
views
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
views
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