Questions tagged [earth]

Earth is the planet on which we live, the 3rd planet from the Sun. Questions using this tag should be about Earth the planet and not Earth-like planets nor earth, as in dirt or soil.

Filter by
Sorted by
Tagged with
0 votes
1 answer
76 views

What happened to Newton 3rd law if our Moon is moving away at 1.5" yearly? [closed]

Our Moon is going away and I read that it is the culprit is our ocean, but then what happens to Newton 3rd law there should be an equal and opposite forces too so where's that? Is it absorbed by the ...
user6760's user avatar
  • 13k
17 votes
6 answers
5k views
+100

Would a giant ball on earth roll towards the poles?

The radius of the earth is higher at the equator than at the pole. Would it mean then, that if I put a giant ball at the equator, it would roll up towards the pole? Why, why not?
AlphaLife's user avatar
  • 11.5k
0 votes
6 answers
135 views

Conservation of water?

I know that water can exist in various states (liquid, solid, ...) and can be in various places (clouds, oceans, ground, ...). What I want to know is whether or not the total number of water ...
Will Octagon Gibson's user avatar
20 votes
1 answer
1k views

If the tidal bulge on the earth speeds the moon up, how does the moon move to a higher orbit?

I understand that the moon causes a tidal bulge on Earth, and this tidal bulge moves slightly ahead of the moon due to Earth's rotation. When reading about why the moon is moving away from the Earth, ...
WillowRook's user avatar
0 votes
1 answer
66 views

Are there reasonable models of Earth's surface as the space $\mathbb{R}P^2$? [closed]

Everyone knows that the Earth's surface is a 2-sphere, or a geoid. Flat earthers propose that Earth's surface is a disk or some variation of that, and there is lots of discussion on why its not true ...
Rumpelstiltskin's user avatar
27 votes
2 answers
6k views

Is the speed of Earth's spinning constant over a given 24 hours?

Is the speed that the Earth spins on its axis constant over the course of 24 hours? As opposed to does it turn faster and slower during different hours over any given day even by a very small ...
JohnTrainor's user avatar
1 vote
4 answers
162 views

What's my displacement relative to my position a year ago? [closed]

Earth moves in a few different ways through the universe. Earth orbits the Sun (plus the orbit precesses), the Sun moves through the Milky Way, and the Milky Way moves through the universe. Compared ...
shim's user avatar
  • 135
0 votes
0 answers
44 views

Does the Earth's magnetic field lag behind the Earth as Earth orbits the sun?

I imagine that when the earth orbits the sun, the earth's magnetic field is also subject to the sun's gravity, since photons and light are subject to gravity. As a result, the magnetic field does not ...
garmichaels's user avatar
-1 votes
1 answer
71 views

How fast do I have to fly vertically up to pause sunset?

I'm standing on the famous Laguna Beach in southern Los Angeles to watch the sunset on December 18th (33.541679°N 117.777214°W, 0m elevation, 16:44 PST). Now, from my perspective at the shore, the sun'...
Richard Zhu's user avatar
1 vote
1 answer
25 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 ...
user6760's user avatar
  • 13k
0 votes
0 answers
22 views

If I levitate at the same place will I come back to the same place after Earth taking it's one complete revolution? [duplicate]

so i have this question if i mean if we can levitate and decide to levitate and not stay on ground but at a place to look the ground, and we that earth rotates right and we rotate along with it cause ...
SHRAVAN NETHA's user avatar
1 vote
2 answers
51 views

Coriolis force relation to wind velocity

I'm learning coriolis effect on Winds moving from equator towards North pole. This is for geography. Question: Why is coriolis force stronger for winds having larger speed(larger component of ...
Nikhil Aradhya's user avatar
0 votes
0 answers
43 views

Does earth revolution speed slowing down because of small drag from space is not empty?

I read that universe is not empty, in least dense parts has 1000 atoms per cubic meter, does that slow down earth speed? Why these atoms are there, why they are not attracted by surrounding gravity ...
user707264's user avatar
0 votes
1 answer
86 views

Has a heavier atmosphere and the relocation of oil around the Earth had a measurable effect on the rotation of the Earth?

I am wondering if the man-made carbon emissions put in the Earth's atmosphere over the past 100+ years, and also the relocation of oil around the Earth over this same time period, has had any ...
user57467's user avatar
  • 403
3 votes
2 answers
1k views

Could Earth's Zircon (used in geological dating) have formed in extraterrestrial events before the Earth was formed?

This is a follow up question asked and answered (Radio-dating and the age of the earth) The answer was given that the mineral Zircon is formed under high pressures and temperatures. How do we know, ...
Lucas's user avatar
  • 39
3 votes
1 answer
503 views

Are there torques affecting Earth?

Since the time it takes for the earth to complete one rotation about itself (i.e., the time we call "day") is not constant, then the angular speed is also not constant, that is, there is a ...
Yossi Lonke's user avatar
2 votes
1 answer
81 views

How does the excess GPE of a mountain cause its base to melt?

Weisskopf suggested that the Gravitational Potential Energy (GPE) of a vertical column of mountain rock of mass $m$ must be less than the latent heat of fusion $L_f$ of the rock, i.e. $$mgh<η L_fm ...
Yitian Chen's user avatar
0 votes
1 answer
74 views

Escape velocity from a rotating body depending on latitude

So the earth's escape velocity since the earth is rotating is dependent on the latitude. As stated in Wikipedia here: For example, as the Earth's rotational velocity is 465 m/s at the equator, a ...
Dirt DIRTSmurf Worth's user avatar
0 votes
0 answers
20 views

Magnetic Field of Earth and Turbulence of plasma

We generally know that plasma turbulence creates magnetic field (here, I have assumed that it happens through the dynamo effect). it is also affected by magnetic fields. Is it possible that plasma ...
QuantumMaster1's user avatar
0 votes
1 answer
45 views

Is this Volcanic or Impact winter management proposal right? [closed]

In case of a volcanic winter where a VEI 8 volcano releases large amounts of SO2 and H2S into the stratosphere making it react with OH and H2O to form sulfuric acid (H2SO4) wich would prohibit most of ...
gragggle's user avatar
0 votes
1 answer
113 views

Which gravitational differences we would feel if the sun disappeared?

I would like to start by stating that I'm not a physicist, I'm purely a curious individual. I've been speculating about the differences the loss of the sun's gravitational field would have on us and ...
Bernard Walters's user avatar
1 vote
0 answers
33 views

Orbital obliquity of the Earth

Consider that we have all the orbital parameters that characterize the Earth. How would one calculate the orbital obliquity of Earth? One could argue that since the rotation of Earth doesn't change ...
RKerr's user avatar
  • 1,171
0 votes
1 answer
84 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 ...
JohnTrainor's user avatar
0 votes
1 answer
40 views

Electricity through water

If you're sat in a body of water through with an electric current runs, can you survive if you create an earth wire to lead the electricity away from you?
Jane Doe's user avatar
1 vote
1 answer
104 views

How is it that underground nuclear tests create huge caverns without violating conservation of mass?

If a multi-megaton underground nuclear test 500m down in deep hard rock detonates, we’re told that it will leave a rather radioactive cavern in its wake (I’m just using Gnome as an example, I’m not ...
Dai's user avatar
  • 129
1 vote
2 answers
55 views

Would a compass on its side point at the ground?

From a point just north of the equator, A straight line to the Magnetic North would be through the earth. If a compass was turned on it's side, would the north pointing arrow point toward the ground ...
Air Fried Quads bw's user avatar
2 votes
2 answers
56 views

Is it possible to measure Earth's rotational acceleration with a home experiment?

Is there an experiment that is achievable using materials you could order online to measure Earth's rotational acceleration at home?
Vienna Wyler's user avatar
9 votes
3 answers
2k views

Why is aurora borealis circular in shape when viewed from space?

These are some false color images of the northern lights captured by NASA's satellite Dynamics Explorer-1. Image credits: Dynamics Explorer - 1 (DE-1) Spin-Scan Auroral Imaging (SAI) Photo Gallery It'...
AlphaLife's user avatar
  • 11.5k
1 vote
0 answers
31 views

In Cyclical Cosmology (Big Bounce) is it possible the new universe will be different or the same? [closed]

Could it be a universe with similar laws to ours but a different configuration of matter, so there may be another earth like planet in this new universe?
Adam Shakeel's user avatar
1 vote
1 answer
55 views

When I see a rainbow in the sky, is the full EM spectrum included? does it form a disc and not just a circular arc?

If you could actually see every part of the EM spectrum from a rainbow, would the circle be completely filled in? and would it also extend further outwards from the visible spectrum?
Franklin Montez's user avatar
5 votes
2 answers
150 views

What is the gravity in the center of Earth?

Let's suppose the earth is perfect sphere and let's ignore its rotation and movement. What would happen if i would be in the center of the earth? Would the gravity be zero in any direction so i wouldn'...
matej's user avatar
  • 159
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
Tapan Gupta's user avatar
7 votes
1 answer
3k views

Why does the Earth's magnetic field have an angle of 11.5°?

Does anybody know why the magnetic field of the Earth have an angle of 11.5°? According to a theory by Prof. Blackett, Earth has magnetism due to the rotation of the the Earth about its own axis. (...
Aarav Raj's user avatar
  • 101
2 votes
1 answer
84 views

Measuring Earth's circumference in Genius documentary by Hawking

I was watching the first episode of the Genius documentary series by Dr. Hawking. At the beginning of the documentary, the people prove that the Earth is round and not flat by going to a lake, and ...
Taela Shanthi's user avatar
1 vote
2 answers
114 views

Will the moon ever proceed to lose its orbit and hit the earth?

Assume that the moon it orbiting the earth in a circular trajectory. It will experience an acceleration directed towards the centre of the earth given by $\frac{GM}{R^2}$ where $G$ is the universal ...
Orpheus's user avatar
  • 335
16 votes
6 answers
4k views

If another planet was opposite Earth, would we be able to observe it?

Imagine another Earth-sized planet, in the exact same orbit as Earth, but 180 degrees out-of-phase. In this arrangement, at all times, you would be able to draw a single straight line through space ...
ConnieMnemonic's user avatar
0 votes
0 answers
35 views

So I've found out heavier objects technically do fall faster? [duplicate]

Given the Earth's mass to be $M_E$, I know that $F_G = -\frac{GM_Em}{d^2}$, so the gravitation acceleration of a mass towards Earth is $g = -\frac{GM_E}{d^2}$. But what about the force exerted by the ...
Ibrahim Nadeem's user avatar
59 votes
4 answers
9k views

Why does CNN's ‘gravity hole’ in the Indian Ocean dip the sea level instead of raising it?

Ref. There is a ‘gravity hole’ in the Indian Ocean, and scientists now think they know why According to CNN, the 'gravity hole' is an area of decreased gravity, compared with the surroundings. This ...
Paul Uszak's user avatar
0 votes
2 answers
120 views

Using earth as a conductor

"To use the earth as a conductor, you can't merely stick a little wire into the ground next to the tomato plants. You have to use something that maintains substantial contact with the earth, and ...
utterdisaster's user avatar
3 votes
1 answer
49 views

Does a planet's "equatorial bulge" induce any kind of motions or currents in the atmosphere?

Rotating planets, like the Earth, are not perfect spheres but are instead oblates. This affects both the crust and the atmosphere, creating a bulge in the equator 1. I was wondering if there are ...
vengaq's user avatar
  • 2,028
2 votes
1 answer
58 views

How large would the earth have to be to retain hydrogen?

How high would the earth's escape velocity have to be to retain hydrogen or helium over geological timescales?
blademan9999's user avatar
  • 2,870
1 vote
1 answer
46 views

What is the EM spectrum of the earth seen by a satellite?

I am asking because of the greenhouse effect. It is said that without the atmosphere, the average surface temperatur of the earth would be about -18 celcius. This number is obtained simply by assuming ...
poisson's user avatar
  • 1,759
-1 votes
1 answer
54 views

Coriolis effect and Cyclones

The Coriolis force predicts that winds in the northern hemisphere should be deflected in a clockwise pattern and winds in the southern hemisphere should be deflected in an anti-clockwise pattern. Why ...
Debanjan Biswas's user avatar
0 votes
0 answers
29 views

How much more voltage is required, theoretically, for a lightning bolt to strike than is actually observed/detected?

Scientists are always saying that they cannot fully explain how lightning works, especially when it comes to the fact that there doesn't seem to be anywhere near enough potential difference between ...
Kurt Hikes's user avatar
  • 4,357
0 votes
1 answer
126 views

Force of Gravity on earth

If you were to remove all the water from the Mariana trench would you experience more g's at the bottom of the Mariana trench or at the top of mount Everest?
kolu's user avatar
  • 1
1 vote
1 answer
228 views

Why doesn't water accumulate at the Equator under the influence of the centrifugal force of the Earth's rotation?

During the rotation of the Earth, a centrifugal force is formed, according to the actions of which ocean water should be collected at the Equator, forming a "hump" hundreds of meters high. ...
Vladimir Orlov's user avatar
-5 votes
1 answer
98 views

Can the four Seasons of planet Earth be defined in terms of Energy? [closed]

Can the four Seasons of planet Earth be defined in terms of Energy? The definition of Energy gotten from Google is: ability to do work, which is the ability to exert a force causing displacement of ...
Pika-Chu's user avatar
0 votes
1 answer
66 views

Has anyone experimented with simulating moon lighting?

Has anyone (in general) experimented with simulating moon lighting? It means the following. A gray ball is illuminated with light with a brightness equal to that of the sun. And at the corresponding ...
Vladimir Orlov's user avatar
1 vote
1 answer
85 views

Is Earth's magnetic moment vector oriented parallel or antiparallel to the sun's magnetic moment?

Just curious how these two magnets are spatially related to? And in case there is no any special preferred particular orientation, what is anyway their spatial orientation relation (relative angles)? ...
Markoul11's user avatar
  • 3,841
0 votes
2 answers
92 views

What earthbound experiments show gravitation is general to all matter, and not just towards the earth?

I was debating a flat earther and predictably it turned into a debate on gravitation. He said as far as we know, things fall down to the earth, not because its towards the greatest mass. The ...
Hisham's user avatar
  • 1,821

1
2 3 4 5
23