Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [physics]

For questions regarding the physics relevant to fictitious worlds. General physics may be off-topic.

5
votes
1answer
61 views

What kind of transports would be invented in a world with an enhancer-material?

You have a material that greatly enhances electric and magnetic sources or electro-magnetism in general. In this world, the material, is known to be a naturally occurring liquid found in geological ...
6
votes
0answers
61 views

The mass of an economically feasible non-microscopic traversable wormhole

Background In my hard sci-fi settings, there is an advanced Type II Civilization, that are progressing toward Type III Civilization (yes, I am referring to Kardashev Scale). They are sprawling across ...
-2
votes
6answers
184 views

200G to 1G environment

Let's say a human were to live most of his life in a 200 G environment but then suddenly enter a 1 g environment, What would be the effects to his body and will this give him the ability to carry ...
21
votes
6answers
5k views

What would birds look like if they used buoyancy to fight gravity?

What would birds look like if they did not have to fight gravity to fly? The question comes from the premise put forward by some that gravity is not real and that what holds us down is pressure ...
4
votes
3answers
245 views

Could a more convenient form of energy transfer/storage than electricity be possible?

I was thinking about the progress that has been made in terms of energy usage for e.g. transport purposes and noticed how the prominent source of energy had changed over time: first muscle power, then ...
3
votes
2answers
128 views

Mechanism to slow down the light emitted by an object such that it will result in inaccurate position of the object to the observer?

Let's say that there are two people named S and C. They are not far apart; less than 10 meters. Let's also assume the scenario takes place in late evening or in the night, for simplicity. Normally ...
19
votes
11answers
7k views

If the SUN of our planet was the same size and proximity of the moon, would it still work as usual?

I'm building the world of my story for my comics and I've come to a bit of a standstill with a particular idea. Assuming there were no other planets in our universe, just a single planet Earth. The ...
4
votes
3answers
163 views

Would fast decompression take place in a sealed tower on an Everest-sized mountain?

I have a large skyscraper-sized tower built at the summit of the highest peak in my world. At that height, I am aware that people need oxygen masks and other aids to survive for long and reach the ...
6
votes
6answers
1k views

How might a purely mechanical 'voice' function?

In my world there are mechanical semi-humanoid automata. Would it be possible to make them speak in a fashion that sounds natural (i.e. human)? How might it function? The mechanism should be capable ...
4
votes
4answers
205 views

How long would it take a matter-antimatter GeV gamma ray laser photon rocket to get to Ross128b (11 light years away)?

I'm writing a colony story, and I want my ship to colonise Ross128b, which is 11 light years away from Earth. I need the characters to be alive when they get there, but it's okay if they've aged ...
4
votes
2answers
140 views

How much heat would a 1km asteroid release into earth's atmosphere?

I am writing a theory for a game that is in an apocalypse. An asteroid is heading for earth and will crash into the earth regardless in this theory. It is 1km in size but due to the YORP effect it has ...
27
votes
5answers
5k views

How to detect that the universe got mirrored?

This might be more fit in physicsSE, but since I don't even know if my premise is physically sound, I'll post it here. One day, something caused the universe to get mirrored, meaning a left-right ...
3
votes
3answers
199 views

Mechanical amplification without creating huge distances?

How would a mechanism look that allows a person to e.g. turn a crown-sized wheel (from a watch) by any amount (e.g. 180 degrees) resulting in a turntable (from train yards) turning the same amount (e....
1
vote
3answers
228 views

What would an earth-sized world be like if shaped like Ultima Thule?

Recently, pictures taken by the New Horizons space probe were released depicting the unusually-shaped object Ultima Thule. Now, suppose there was an world the size of the Earth, but in the shape of ...
1
vote
0answers
71 views

Internal Body Heat of Giant Animals. At which point would their size cook them from inside? [closed]

It is my understanding that one of the reasons for why massive lifeforms (as depicted in fiction) aren't possible is the fact that the heat radiated by their body after a certain point would be too ...
0
votes
2answers
129 views

Can E=MC2 be used when thinking about human strength

As we know just because a person has more mass that doesn't mean they can lift more weight or punch harder as those actions are more about training your technique. My story is a martial arts / ...
1
vote
0answers
46 views

Effects of magnetic fields overs biological life [closed]

How would life evolve on a planet or other place with a high magnetic field? (It should be a field strong enough to attract tools and weapons and stick them to the ground.) The life forms that would ...
6
votes
3answers
223 views

How strong would a person need to be to cut cleanly through steel plate?

The problem is that I would like to know how strong the creature I have in mind will end up being and if that would be too strong. I know that 15th century plate armor was very good against slashing ...
9
votes
4answers
2k views

Would it make sense to use destructive wave interference to silence gunfire?

So based on my limited understanding, some luxury cars have taken to using their sound system to make the cabin quieter when on the highway or something (Active noise control via wikipedia). And I ...
19
votes
12answers
2k views

What is the best design for docking onto a rotating space-station?

In the distant future, space-stations use centrifugal force to emulate gravity, effectively being a cylinder (or something similar like a wheel) spinning around a central axis at high speeds. A ...
9
votes
6answers
796 views

Are fly wheels a valid means of energy storage for powering a large space station?

This is something that was just offhandedly mentioned in a Sci-Fi book I read once and as I am now writing one myself I thought I might use it. The scenario is that I have a ship approaching a warp ...
3
votes
0answers
126 views

What would the periodic table look like in 2 dimensions? [closed]

I've read this question What would the periodic table of a 4-Dimensional universe look like?, and I think it answers part of my question about how atomic physics would work, but I'm not sure. Would a ...
11
votes
9answers
3k views

Feasibility of an endothermic gun

I had the idea of a "void weapon", which would "generate cold" rather than heat on triggering. All the air from the chamber would be sucked out (thus "creating cold") and on firing, it would open the ...
19
votes
2answers
2k views

Is it possible to place a permanent probe on Uranus?

Before anyone points the finger saying this is a tasteless joke, there are some actual good reasons to pick that specific planet for exploration among the giants in our solar system: Smallest mass ...
-2
votes
5answers
159 views

If the earth is not flat, are we walking uphill or downhill? [closed]

If the world isn't flat and a person is walking around it from east to west. Is he walking downhill or uphill ? (This a stupid question on many levels, but I'm looking for intelligent answers.)
7
votes
5answers
306 views

Barring all structural and stability issues, how would building a ringworld around the earth affect it?

I've looked for an answer for this, but the only information I could find dealt with the ring itself. All I want to know is what would change on the Earth if all problems were solved and the ring were ...
-3
votes
6answers
424 views

Can magnetism be what causes my flat Earth to accelerate?

It has been determined by observation of the stars that the gravity on Flat Earth is due to it accelerating upwards at 1G. This is what holds people and objects to the surface. It has also been ...
22
votes
12answers
7k views

Imprisoning people in frictionless bowls

The king's mages have made a discovery: they can create perfectly frictionless surfaces using a new spell. The king immediately suggests a use for this spell: Use it on areas of floor, to keep ...
2
votes
0answers
68 views

Plausible? Mechanics of Floating Continents/Islands on Gas Giant (with sea) [closed]

Just thought of how a gas giant would have the physics to entertain floating islands/gigantic landmasses + a floating sea of water. Pretty much just wrote down whatever i could think of. Basically, a ...
1
vote
2answers
226 views

Time manipulation based on physics equations

I'm fairly new to the idea of writing.... anything, and I was asked to make a character to insert in a friend's world. I am trying to create a fictional character that has the power of manipulating ...
1
vote
2answers
130 views

Spaceship Engineering & Infrastructure Challenges: Air Currents

I have a spherical spaceship that is about 2 kilometers in diameter with an outer clear, yet strong shell. This spaceship is largely made up of empty space occupied by air. Aside from this the ...
2
votes
3answers
151 views

Artificial gravity of spinning sphere

I have a colonized asteroid that is roughly spherical and has been hollowed out. To create artificial gravity I spin the asteroid creating a strip of 1g gravity around the "equator". What would happen ...
-4
votes
1answer
114 views

How to create matter in a solar system [closed]

I looked to see if anything like this was asked, but can’t find. So a star is formed, the sun for instance., and creates a gravitational force on its own. After a billion years a kuiper belt ...
2
votes
3answers
198 views

Could a gas giant have two earth sized moons in binary orbit around it

I’m trying to create a system where a gas giant has two moons in binary orbit with each other. I’m trying to get that James Cameron look with the gas giant on the horizon, but also have a equally ...
3
votes
6answers
2k views

What happens if there is no Air Friction [closed]

In my world everything is formed from the following fundamental elements. Air, Water, Fire, Earth, Nature and Mana. I wanted my creations to be able to travel faster than the speed of sound with no ...
2
votes
1answer
56 views

apply forces such that satellite reaches a given point in space

The problem is the following: let's say we have a miniaturized satellite*, X; we know its position, velocity, acceleration, the forces applied at any given moment; we also know its mass, its ...
13
votes
3answers
2k views

Is it really possible to see across a ringworld? [duplicate]

Almost all illustrations of ringworlds that I've come across tend to show off the shape of the ringworld from the surface. This doesn't seem realistic to me, because the ringworld's radius would ...
4
votes
2answers
129 views

Equation to get the size of a crater created by a meteor strike?

Im trying to find the equation to the the size of the resulting crater created by meteor strike when I have the mass, volume, diameter, density, velocity and kinetic energy of the meteor Can ...
47
votes
3answers
20k views

Let’s say a 1 ton (US) sphere of tungsten moving at 99.99% the speed of light hits earth, what happens? As specific as possible

What kind of destruction would it cause? I’m assuming it’d be rather significant, could it shatter a tectonic plate? The crust? How would the oceans fare? Would the planet be able to catch the ...
11
votes
6answers
2k views

Teleportation - Pressure differences

Warning This question is one of a series about specific use of teleportation. It will concern only about pressure and atmosphere. Here are previous question: Teleportation and speed Context The ...
34
votes
4answers
5k views

The Heisenberg Uncertainty Ray - A Hyper-Scanning Doomsday Weapon

From what I know about the Heisenberg Uncertainty Principle, one of its consequences is that when you learn a great deal about the position of a particle, you greatly increase the uncertainty of the ...
10
votes
2answers
549 views

Planetary cave: Gravity inside a non-concentric shell

There are several previous questions concerning concentric shells. I won't reference them here because this is different. I understand that there is no gravitational effect inside a concentric shell*....
27
votes
6answers
7k views

Would one atom of antimatter be lethal if annihilated inside the brain?

I am dealing with a dystopian story that tries to come up with some kind of total surveillence or control from higher authorities. The authorities threaten to kill those who disobey them by simply ...
5
votes
4answers
719 views

Teleportation - Keeping momentum on arrival

Warning This question is the first of a series about specific use of teleportation. It will concern only about momemtum and speed: other subjects will be exposed later. Context The story happens in ...
11
votes
7answers
4k views

What size EMP device would be necessary to wipe all data in a Google-sized server farm, without major physical damage?

I'm not sure if it's even feasible, but I have a server farm in my book, of a size that puts it on par with Google's. I want to wipe out all the data stored on the hard drives, without destroying the ...
2
votes
3answers
133 views

Can a character perform telekinesis with energy manipulation?

I knew that energy is a scalar quantity, so I wonder can a character move and alter direction of an object at distance by giving it kinetic energy? Thanks.
0
votes
1answer
158 views

how could a computer in the first dimension perform multiplication? [closed]

If it is possible for a computer in the first dimension to perform a second dimensional operation in the same way a computer in the second dimension can perform a third dimensional operation, then ...
-2
votes
1answer
114 views

Fully understanding a universe from within that universe. Gödel's second theorem [closed]

Gödel's second theorem asserts that the consistency of a formal theory containing arithmetic cannot be proved by the tools of the relevant theory itself (provided that the theory is in fact consistent)...
2
votes
2answers
269 views

Dimensions of an O'Neill cylinder with gravity and coriolis force like surface of Earth

What would be the diameter and rotational speed of an O'Neill cylinder on the inside surface of which centrifugal and coriolis forces are equal to "gravity" and coriolis force on the surface of Earth ...
6
votes
3answers
243 views

Could a creature like the brethren moons exist in reality?

I recently came across a game called dead space and a certain main antagonist species inside of the game. In this game you play as the main character who is trying to protect humanity from sentient ...