All Questions
Tagged with earth homework-and-exercises
74
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Rotation of earth and effect on $g$ [duplicate]
How do we calculate the change in the acceleration due to gravity (consider earth as a uniform sphere) with a change in the rotation speed of earth along its axis?
How do we build up a mathematical ...
- 11
3
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2
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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
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3
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2k
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Are we increasing the gravity of Earth with our population?
I have these questions related to my question title:
Do we, other species and things have our own gravity?
How much Gs a human have?
Are we effecting Earth, nearby moons and planets with our gravity?
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How much radiation does the Earth receive from the Sun's total radiation? [closed]
I was thinking how to solve this problem. $1\,\mathrm{AU}$ is roughly the distance from the Earth to the Sun, $1.4960 \times 10^{11}\,\mathrm{m}$.
The radius of Earth is approximately $6.4 \times 10^{...
- 907
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4
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250
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Does not the mass of those living on the Earth add on to the mass of the Earth or is it too negligible to be cared for?
Source: Earth weighs about 13,170,000,000,000,000,000,000,000 pounds (or
5,974,000,000,000,000,000,000,000 kilograms). Since Earth is too big
to be placed on a scale, scientists use mathematics ...
- 669
3
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2
answers
299
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Reaction due to gravity
There is a reaction to the gravity of the earth on us but the earth does not move due to its huge mass. But what if I combine the weight of all humans and other things on Earth? Is it not enough to ...
- 785
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2
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746
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How long will it take before the orbit of the earth is 365 days exactly?
I understand that the number of days per year has changed throughout the history of the Earth. Apparently there were once over 400 days per trip around the sun.
How long will it take approximately ...
- 121
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1
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216
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Centrifugal force on objects rotating around Earth
Suppose two objects travel around the equator on Earth at the same speed, $v$, in opposite directions, where the speed $v$ is measured relative to the Earth's surface. Will they experience different ...
- 103
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2
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257
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Reduction of Earth's rotation due to increase in humidity
I came to know that, moon is moving away from earth, resulting reduction of Earth's rotation. Similarly, if Earth's humidity increases, water vapor will be move up to the air from water sources, will ...
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1
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500
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Motion of a ball in a tunnel along Earth's diameter [closed]
Suppose, a tunnel is made along the diameter of Earth and we drop a ball inside it. How will the ball behave? Please help me understand.
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1
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How much energy would it take to stop Earth's rotation on its axis?
I see a lot of questions regarding situations what would happen if the world would stop spinning. This got me to wondering how much energy it would actually take to stop the world from spinning.
- 1,348
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172
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How much time would it take for a free-falling ghost-like object to cross the entire Earth? [duplicate]
We have an object of mass $m$ which can go through matter like a ghost. It's only affected by gravity, not by any other force, so it's in free fall.
At the instant $t=0$ it is at the surface of the ...
- 1,613
3
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1
answer
2k
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How much potential fusion energy is in Earth's ocean?
Assuming the most efficient manner for extraction, and a ready supply of other necessary materials not mentioned herein, and given the current estimates about the volume of Earth's ocean, how much ...
- 421
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How much energy would it require to send Earth to Proxima Centauri?
Assuming 100% efficiency of energy usage, and given the current estimates about the mass of known objects in our solar system, including Earth itself, and assuming no other objects are affected by ...
- 421
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2k
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How does the Moon cause the tides?
I am considering the following question, but I can't quite figure it out...
I have looked up differential gravity, but I cannot derive the equation for the effect on Earth, and I haven't found any ...
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