All Questions
87
questions
0
votes
1
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120
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Is there any way to create a globe with gravitational or similar attractive force - earth simulator?
This may sound like a dumb question.
Is there anyway to create a miniature version of earth or its gravitational force.
A globe or sphere which have force inside it which can attract the things ...
- 109
14
votes
4
answers
2k
views
What is the general relativity explanation for why objects at the center of the Earth are weightless?
The idea that as you move through the earth you get a symmetric cancelling of gravitational acceleration which approaches zero acceleration due to gravity at the center of the earth makes a lot of ...
- 1,039
2
votes
0
answers
49
views
The moon affects the motion of the oceans, but can the motion of the oceans affect the moon? [duplicate]
Obviously the earth's oceans have mass and therefore they have an attractive force upon the moon.
However, let's say that we were to cover most of earth with tidal power generators that extract some ...
- 121
0
votes
1
answer
268
views
Gravity Relative to Mass?
Why is it that, in basic physics, it is taught that the acceleration of gravity is the same for objects of any mass (at a constant distance from earth)? Why then is the acceleration of gravity ...
- 113
1
vote
1
answer
122
views
Earth density distribution from shooting neutrinos?
I am interested in possibility of inferring Earth interior structure from gravitational data. As classical calculus problem shows, it is impossible to understand non-uniform density distribution ...
- 13
0
votes
4
answers
260
views
What exactly produces gravitational force? It just can't emerge out of no where depending on mass, distance etc
I tried getting the answer from the internet but it says that it is still a mystery.
1
vote
1
answer
159
views
Forces that fall under gravitational forces
I was explaining the air motion in the atmosphere, so I introduced Gravity, Pressure Gradient and Coriolis Forces. Then one of the Professors asked me this question, which I couldn't answer. He said ...
- 11
-1
votes
1
answer
541
views
What forces carry hovering objects around the earth with its rotation?
My questions are:
a) What significant forces “carry” flying objects around with the rotation of the earth,
b) How do each of those forces contribute to that “carrying”, and
c) How relatively ...
- 103
-1
votes
1
answer
100
views
Does earths gravitational force decreases?
I feel that attractive gravitational forces on Earth is somewhat similar to attractive magnetic forces. However, because the magnet loses some of its attractive force over time, will gravitational ...
- 101
3
votes
1
answer
354
views
How is it we have helium on earth?
Earth gravity isn't strong enougth to hold helium so we are loosing it constantly. If earth assembled out of space dust how come we have helium? Where did it come from?
- 1,125
4
votes
2
answers
414
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How do we age if we tunneled to Earth's core?
Scenario
Suppose there exists an advanced technology that can hypothetically transport living humans to study the center of the Earth, as they goes deeper underground most of the Earth's mass would ...
- 13k
3
votes
1
answer
196
views
Wouldn't dark matter throw off the calculation of Earth's 'light' mass and estimates of its composition?
The Cavendish experiment first determined the mass of the Earth and (arguably) the gravitational constant. However, given the ubiquitous nature of dark matter, it seems reasonable that at least some ...
- 532
-1
votes
2
answers
132
views
How does the earth do a negative work on a static body? [closed]
If a body is in rest and the earth acts with a force on it 10 N
Is there a negative work done by the earth though the body doesn't move? how?
does it have a common thing with potential energy?
- 599
10
votes
3
answers
226
views
How much additional light does Earth receive from the Sun due to Earth's gravitational field?
I was reading about how gravity affects light, and that got me wondering how much additional light is collected by the Sun due to the Earth's gravitational field.
Is it a significant amount of light (...
- 203
3
votes
1
answer
1k
views
Electromagnetic radiation bending on Earth
Most articles say that a radiowave is able to propagate itself beyond the horizon because it is reflected off by the ionosphere (and the Earth itself).
But do radio waves also get bent according to ...
- 133