Tagged Questions
4
votes
1answer
59 views
How would gravity change on a planet rotating around itself very fast?
Let's take a planet identical to Earth, but with rotation speed multiplied by ten thousand. What would happen with the gravity if it was spinning madly around itself? Would the centrifugal force make ...
0
votes
1answer
59 views
Geodetic model for numerical weather prediction
What is the implicit geodetic model used by common numerical weather prediction products? WGS84? NAVD88?
For example, NOAA's Rapid Refresh (RAP), North America Mesoscale (NAM), and Global Forecast ...
1
vote
3answers
262 views
Speed of the Moon
Why the motion of the Moon looks very slow in the sky? Doesn't it need the high speed in order to escape the earth's gravity?
2
votes
2answers
126 views
How does earth carry moon with it, if it can not force moon to touch it by gravitational force?
earth's gravitational force is acting on its moon in such a way that it forces moon to rotate round its orbit by centripetal force and carries it while rotating round the sun by gravitational force. I ...
3
votes
1answer
70 views
Does the Earth have a semi-solid body at its core because of lower pressure at the center of the Earth?
I have read that the Earth has a semi-solid iron body at its core, even though that object is surrounded by liquid magma.... I'm wondering if this is because of a pressure (and resulting temperature) ...
4
votes
1answer
188 views
If the Moon had gravity as good as the Earth and a magnetic field could it have supported life?
If the Moon had gravity as good as Earth and a magnetic field could it have supported life? Because if the Moon had gravity, it could have retained water more than is present today on the surface.
...
3
votes
2answers
217 views
Deviation from Earth's orbit
How much orbital deviation is required for the Earth to get knocked out from current orbit so it either moves away from Sun or towards the Sun?
0
votes
1answer
108 views
What is the gravity at the center of the Earth? [duplicate]
Possible Duplicate:
Would you be weightless at the center of the Earth?
Supposing there is a cavity at the center of the Earth, what is the gravity there? What will be its direction and ...
0
votes
2answers
622 views
If the earth would stop spinning, what would happen?
What would happen if the earth would stop spinning? How much heavier would we be? I mean absolutely stop spinning. How much does the centrifugal force affect us?
If you give technical answers (please ...
2
votes
3answers
689 views
Could we make a trebuchet that could launch objects to a stable orbit?
Inspired by this xkcd, which calculated the energy requirements for accelerating individual humans to escape velocity (regardless of consideration for what that would do to your organs), I am ...
18
votes
4answers
1k views
Would you be weightless at the center of the Earth?
If you could travel to the center of the Earth (or any planet), would you be weightless there?
