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.

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22 views

Can energy be retained if the pressure still stay's the same?

added pressure = Heat, Thought about this for a while what if it was, Pressure = Same heat as before when pressure increased. Is this true?
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Can a pendulum at resting equilibrium position still demonstrate the Earth's rotation?

I conducted an experiment in my youth, creating a 'sand pendulum' hanging from the bedroom ceiling to a bowl of flour. I did not set the pendulum into motion, but rather wanted to see if the force of ...
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Had the centrifugal force of the rotation of Earth in the past forced liquid, hot Pangea to be positioned near the Equator?

Had the centrifugal force of the rotation of Earth in the past forced liquid, hot Pangea to be positioned near the Equator? Maybe also a question for 'GSE' but if we deal with centrifugal forces and ...
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Paradox about greenhouse effect?

I know about the greenhouse effect, but isn't earth receiving the same amount of energy but getting hotter than with that same amount of energy? My guess is that earth reflects less light, but then ...
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Velocity of a car relative to the center of the Earth

If we approximate the Earth's circumference to be $40,075\;km$ we could say that the the amount of time it takes for a full rotation is about $24\; hours$. We could then approximate the rotation of ...
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Will Earth's rotation be altered if a circularly polarized gravitational wave passes through it?

I have read this question: If you rotate a polarized classical electromagnetic wave by 180° about its axis of propagation, you don't get the same wave back; you get the same wave phase-shifted by ...
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Does magnetosphere always conserve the magnetic flux? [closed]

Can someone explain to me whether the Magnetosphere always conserves the magnetic flux?
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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,...
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Did we adapt to Earth or Earth to us? [closed]

I often hear that Earth is a unique planet because it has life and it has its own inhabitance. We also see a proper balance between plants and humans and other animals. Why life is not possible on ...
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What is the unit $P_s$ in this chart about quantum spin oscillation in a magnetic field?

I came across this in an 'Up and Atom' video on YouTube, hosted by Jade Tan-Holmes. It is the third video in her quantum-biology series, about bird navigation, at 13:30 of the video.... The one axis ...
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At the time when Earth was hot liquid why the Si-Al layer covered only partially the Si-Mg layer?

At the time when Earth was hot liquid, why did the Si-Mg layer covered the entire surface, while a less denser Si-Al layer covered only partially the Si-Mg layer? I am very curious as to how a ...
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What is Earth’s total external magnetic flux?

What’s the total magnetic flux of Earth’s exterior magnetic field (webers)? I know Earth’s magnetic field is a little complex, so for simplicity let this be the integral of the surface-normal ...
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What path would it produce if someone kept on going after their shadow (on Earth)?

Imagine someone is standing on the surface of the Earth (let's assume it is completely flat) and they start going exactly in the direction their shadow is cast (that is, exactly opposite of where the ...
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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 ...
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Does Coriolis effect change the direction of an object moving parallel to equator, say along the tropic of Cancer?

It is usually said that the Coriolis force deflects a horizontally moving object to its right in the northern hemisphere and to the left in the southern hemisphere, and an object at the equator will ...
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Do magnetic things fall faster?

Assuming correct orientation, do magnetic things fall faster than non-magnetic ones because of the magnetic field of the Earth? Of course it is clear that if any, the effect is very very small, but ...
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Will the weight further increase while going inside the Earth? [duplicate]

Our weight is more at the pole than at the equator (because it is closer to the center). Does that mean if we go down into the earth (some kind of bore), will our weight increase further? I remember ...
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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 ...
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Is the earth's version of time dictated by the earth's speed? [closed]

Is time on earth, relative to everywhere else, dependent on the earth's speed? Earth rotates at a speed, it moves around the sun, the sun moves around the galaxy and the galaxy is also moving - is it ...
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Is the Sun losing mass and pushing the Earth further away? [duplicate]

With the sun radiating so much energy every millisecond can nuclear fusion keep up with that pace? And if it can’t keep up isn’t the sun losing energy every second and therefor losing mass? Which ...
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What formula is used to calculate the drop off due to the curvature of the Earth?

I found this site that calculates the drop off of the earth at any given distance from an observer. Is this formula correct? http://earthcurvature.com/
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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?
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Earth's surface radiation

Earth's surface radiation I have been researching Earth's energy balance at various latitudes and have posted my work so far on Wordpress at https://hotgas.club with the title "Earth's Radiative ...
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How can i analyse this motion?

Hello (Im from south Korea. im sorry for my english in physics.) im curious about this gravitational spiral motion. can its trajectory and time took to collide be guessable? or can i calculate this ...
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Is there a correlation between the Earth's spin, the moon, and temperature?

Based on NASA's arcticle, changes to land, ice sheet, ocean, and mantle flow affect Earth's spin. Does the moon's elliptical orbit around Earth also affect Earth's spin? What effect does distance play?...
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Will a satellite orbiting the moon have a tidal locked orbit?

Suppose an artificial satellite is launched to orbit the moon. Ignore 3-body problem issues, just assume it follows a roughly titled elliptical orbit relative to the plane cutting through earth's ...
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Why are the Earth and Moon so different?

The suggestion was made that the Earth and the Moon are two parts of a once whole object. If that is true then they must share the same basic composition. They also receive fairly similar amounts of ...
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If an angled mirror is bolted to the equator, does the Earth change speed?

After reading If a jet engine is bolted to the equator, does the Earth speed up? I came to think of solar sails. If an angled mirror is bolted to the equator, will it change the speed of the earth ...
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If a jet engine is bolted to the equator, does the Earth speed up?

If a jet engine is bolted to the equator near ground level and run with the exhaust pointing west, does the earth speed up, albeit imperceptibly? Or does the Earth's atmosphere absorb the energy of ...
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Angle of dip and Magnetic meridian

I was recently studying Earth's magnetism. I came across two definitions of angle of dip. " it is the angle made by the dip needle with the horizontal to the earths surface " it is the ...
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Is Earth's North pole actualy a South pole?

As far as I am concerned, the compass is facing along the magnetic field lines on the Earth's surface which in turn points towards the North pole by its design. But for a magnet, the field lines go ...
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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 ...
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If Earth is oblate why don't oceans flow to the Poles?

The Poles are ~21 km downhill from the equator in a spherical coordinate system. So why doesn't water pool there?
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Will a neodymium magnet levitate on ice at Earth's North and South Pole?

Will a neodymium magnet levitate on ice at NP or SP? Asking just because these magnets are powerful and the Earth magnetism is fairly stronger at poles than at the Equator.
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If we point a laser beam from a fixed place to a very distant object will that point move in six months?

As I understand light does not translate itself in direction of its oscillation... So if Earth is moving the trajectory of a laser beam which is emitted from a fixed place should make a point on a ...
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The role of the Sun in spring and neap tides

I am trying to understand how the Sun affects tides on the Earth's oceans and seas. It is quite clear that when the Moon is in the first and in the third quarter, the Sun's and the Moon's ...
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Earth's unimpeded rotation for billions of years [duplicate]

My nephew (7th grade) has stumped me with this question. If I spin a top, it eventually stops, because of friction, air resistance etc. How come the Earth has been spinning non-stop for 4.5 Billion ...
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If the mean temperature of the earth increased significantly, how this would affect the earth's angular velocity?

I was wondering, if somehow the temperature of the earth increased singificantly, how would this affect the period of rotation and angular velocity. I mean the earth would expand and this would also ...
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Flat vs curved Earth horizon?

We consider the Earth is a spheroid and that the horizon is an intersection of the sky and Earth. From this we can conclude that the horizon is always flat, because it's a circle. This explains why we ...
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Solar radiation = Shortwave radiation?

this is a super-basic question but I am new to all this and a bit confused. I want to understand the process of radiation and other things like evaporation on the temperature of the Earth's surface. ...
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Would a body have any residual velocity if launched at escape velocity from the Earth's surface?

A body is lanuched at escape velocity from the Earth's surface i.e 11.2 km/s ,what would be it's velocity outside the Earth's gravitational field? I guess it would be zero but there's another problem ...
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Anti-earthquake stability of wall constructions derived from the physics of differently shaped bricks

I am interested if the proposed shape of bricks would have impact on stability of walls.I think the cube structure would not absorb so well the lever effect when a possible earthquake moves every ...
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In the difference between the sun and moon's tidal effects on earth, is density or distance a larger factor?

This question is inspired by the (now looking at it, improper use of, my bad) comments section here in Physics SE. I'm not sure I could explain better than our short discussion does below: No, the ...
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Why does the rotation axis of the Earth wobble over time?

I've learned recently that the rotation axis of Earth (axial tilt or obliquity) oscillates between 22.1 and 24.5 degrees. I would like to understand why does that happen. Having a basic understanding ...
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Why the Earth isn't negatively charged? [duplicate]

As electricity is transferred in earth by earthing and lightning, why it does not become negatively charged?
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How Newton weighed the mass of the earth without gravitational constant $G$?

I am only wondering about how Newton weighed the mass of the earth if he didn't have the value of gravitational constant $G$, so how he did it? I read about some explanations but i hadn't understand ...
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Can we prove the Earth rotation with a disk mounted in its center on a frictionless axis?

Can somebody prove the rotation of Earth if it places an uniform disk with a hole in its the center on an axis and orient it paralelly to Sun ecliptical disk?Just assure himself that the disk on the ...
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Tilting of Earth rotational axis

In which way do the Earth's rotational axis tilted 23.5°. see in the image we have been told that the axis of rotation of Earth is tilted 23.5° from the perpendicular to path. But can anyone say in ...
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Are the precession and nutation of Earth's core directly connected with precession and nutation of Earth's magnetic field if they are present?

If the magnetic field of Earth is generated in the core of the Earth can we deduce core's precession cycle by measuring the precession of Earth's magnetic field (not Earth as a material object) or the ...
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If Earth slows down its rotation due to tides will this be diminished by the friction between its different layers as they cool down?

If we suppose that planets act simmilarly to galaxies or planetary systems which inner parts move faster than the outer will then the possibly faster inner layers of Earth speed up the surface by ...

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