Questions tagged [physics]

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

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2
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3answers
108 views

Why would a suicide bomber not be blown apart by a rune-bomb? [closed]

I am a homicide detective on the magical police force. Runes are magical symbols fused into objects that imbue those items with magical power. These spells are stored in these runes for long term use ...
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2answers
116 views

What would powers based of the strong force look like?

Or, what physical law can X manipulate in order to have control over the strong force. The strong nuclear force is responsible for binding the all matter together and opposes the force exerted by the ...
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1answer
59 views

How can a being that can create electric attacks use targeted lightning storm strikes?

I found one question that deals with how to make lightning from clouds strike a target person, Can we make lightning strike a certain person? but I am looking for something that doesn't involve ...
5
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2answers
109 views

Maximum Theoretical Energy Density of Clockwork

So, I'm slowly working on a concept a little like "Victorian Shadowrun", where magic is suddenly introduced to Victorian Society. One of the side effects of this is a metal, let's call it Orichalcum ...
6
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5answers
624 views

Need method to eliminate all life on planet [duplicate]

Space faring advanced species needs to 'disinfect' planets in habitual zones around stars. That's all life. They can wait a few thousand years to come back and seed the planet with a new ecosystem. ...
-3
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1answer
121 views

How would life evolve in a universe with constant atmosphere? [closed]

For a type of multiverse, where physics are the nearly same as ours, but space has a constant atmosphere comparable to our Earth's. How and where would life evolve, if it can? what I mean is that the ...
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0answers
47 views

A place for telekinesis in physics? [duplicate]

I am a writer, and I have attempting my first fiction novel. However, I like to have things figured out in a way that works with the laws of physics in the universe, at least to a certain regard. For ...
-3
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1answer
94 views

How much force is required to keep giant towers floating in the sky over a flat earth?

The sky limit is a boundary over the flat earth. The world is the space between the sky limit and the flat earth. A standard tower is 500 meters in length and 50 meters in diameter. The tower has ...
4
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2answers
163 views

What would powers based on the weak force look like

In other words, What physical law can X manipulate in order to control the weak force? And as for the abilities, I...don't have the greatest grasp of what someone can do with the weak force as their ...
3
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1answer
82 views

Can a planet's artificial ring always face the sun?

A habitat/space harbor ring encircles an ice giant crossing both poles (polar orbit) and rotating to create artificial gravity. Can the ring also precess in synchronization with the planet's year, so ...
2
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2answers
188 views

do these mountains look to be in realistic locations?

I'm getting into mapmaking, which I enjoy, but some of the specifics of realism still elude me. I know generally how plate tectonics work, but I was hoping to get some help on a specific example. I ...
28
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5answers
8k views

Can two moons have intersecting orbits yet be guaranteed not to collide?

Working on a D&D campaign. As a physics nerd, I'd like the orbital mechanics of the planet, its sun, and its moons, to follow standard Newtonian/Keplerian mechanics. I'm trying to come up with ...
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1answer
97 views

Concerning magic and the replacement of the four traditional elemants with the four fundamental forces [closed]

In a world of magic where spells are not based on fire, water, air, and earth; rather, the electromagnetic force, the gravitational force, the strong nuclear force, and the weak nuclear force—How do ...
0
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1answer
180 views

How big could a planet get before collapsing due to its own gravity? [closed]

I was wondering, how big could a planet get, with gravity staying the same even with the added mass, before collapsing DUE TO its gravity?(without becoming a black hole) Specifically, I have a world ...
5
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5answers
131 views

Super insulated box/room to store extreme heat possible?

Is it possible in 21st century Earth for someone to create a small super insulated box to store heat like an "anti-freezer" such as putting lava inside the box and the box not being hot to the touch ...
2
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4answers
303 views

Cheapest material per ton on earth?

What is the cheapest material per ton that one could purchase on our Earth in the 21st century? This could also include the cheapest material per ton to harvest so dirt may seem like the obvious ...
5
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4answers
261 views

What would powers based on electromagnetism look like?

Or more specifically, What physical law can X manipulate in order to affect the electromagnetic force? For something to base our assumptions off of, lets assume that we can; Fly Cast lightning ...
6
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2answers
198 views

Is there a safe but weird distance from black hole merger?

I wish to create a world such that it can support the following plot point: the world experiences gravitational waves that are directly noticeable to the human population (i.e. they can feel or see ...
-1
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5answers
180 views

Will it possible to transform thermal energy into electrical energy some day?

Thermal energy is everywhere on earth. If it could be transferred into electrical energy it could serve as a great energy source. This idea is violating the laws of thermodynamics. But it's not ...
5
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5answers
438 views

The effect of a 20 kilojoule punch on a person that is wearing a plate armor

I have always been in love of hand to hand combat but I realize the concept of efficiency and why that is not an ideal choice for combat so I decided to write a story in which characters who are ...
4
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3answers
160 views

is there a way to levitating entire body of water in earth and make it stay in the sky?

as the title, is there a way to levitate entire body of water in earth and make it stay in the sky (not cloud and still in liquid form) ? either natural or man made. the water either flowing or ...
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4answers
195 views

What would be the dangers of creating matter from nothing

Dear top secret science network, Humanity was visited by visitors from another universe altogether (one which doesn't obey our laws of physics) - the D'jini. A diplomatic convoy of them apperead one ...
0
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1answer
58 views

What would an object made from photon matter look like? [closed]

In this article,two photons have been made as to interact with each other. So assuming we managed to make, lets say, a meter by meter cube out of photon molecules that is stable, how would it: A) ...
4
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5answers
221 views

How do I create a “magic particle” to make magic work with physics?

I'm trying to make a fantasy-esque magic system in which everything works pretty much the same as real life, except there's a sort of "magic particle" that makes magic possible, but with physics. In ...
10
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4answers
187 views

Sun with low emissivity?

I'm creating a D&D campaign which takes place on a Mercury-sized planet, orbiting a Proxima-Centauri style red dwarf. It is tidally locked. I would like it to make physical sense as much as ...
3
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2answers
174 views

What would powers based of Gravity look like? [closed]

In the post What would powers based on the four fundamental forces look like? @rschpdr gave permission to ask the question that is stated, but looking at each force one at a time. And so, this is the ...
4
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3answers
134 views

What planet composition is need to have giant human that make earth human similar in comparison to ant size to them?

as the title say my question is: What planet composition is need to have giant human that make earth human similar in comparison to ant size to them? i know realistically and probably its imposible ...
2
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2answers
165 views

Neodymium magnets as nanoparticles bonded with atmospheric amide to create a magnetic 'air curtain'?

Amide bonds are extremely stable and their half-life for hydrolysis in neutral aqueous solution is estimated to be seven years. Amides bind to metal ions through the carbonyl oxygen. Neodymium ...
2
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2answers
115 views

Gravity powers realism

One of the main characters of my book has gravity magic, and I'm struggling to find out how it would work. From what I've read, gravity is the result of immense mass bending space-time, so I have no ...
6
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2answers
134 views

How strong is my hellstone, if about half a mile in diameter pillars of hellstone hold up about a mile of Earth above it?

The pillars are spread out about a mile apart each, and they all come straight from the ground, slowly gets just a smidge smaller in the middle, and then get bigger near the top, reaching a height of ...
4
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3answers
147 views

How can I meaningfully define the energy cost of magical levitation?

In the world I'm building, there is a form of "magic"¹ that effectively amounts to metabolism-powered telekinesis. In particular, there is a maximum power limit of approximately 20 W/kg relative to a ...
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2answers
119 views

what would it need to create indestructible bubble?

Not exactly indestructible, at least after flying to certain height it may pop out. I mean something like the bubble is as hard as stone or steel but still elastic and light to float like bubble, and ...
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10answers
6k views

A feasible and efficient method of fast global travel?

What would be an efficient method of global travel that can take you from, let's say, London to Hong Kong in about an hour? It would preferably be made quickly, but money is no object. I don't want ...
3
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4answers
212 views

What effects would we see on Earth if the speed of light universally increased? [duplicate]

Traveling faster than light poses all sorts of physics problems, so most hard SF has had to handwave FTL. But if light were faster, then ships could be commensurately faster without violating ...
4
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2answers
111 views

Anatomically(?) correct nanobots [closed]

With my limited knowledge of chemistry, molecular physics, and quantum computing, I'm struggling to reconcile sci-fi/fantasy trope depictions of (seemingly) impossibly small nanobots with actual ...
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2answers
77 views

When antimatter meets matter do the two of them cancel eachother out? [closed]

I’ve designed melee weapons akin to lightsabers for my setting that emit a blade made out of antimatter. The handle itself serves as a mini particle accelerator, and it emits a magnetic field to ...
4
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2answers
145 views

Air Pressure in a Purely Underground Setting

I'm working on a completely flat, underground world, where "world" means "universe" rather than the equivalent of "planet". Here's what I have so far: The world is a flat, apparently infinite (in two ...
0
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2answers
85 views

Collect lightning energy [duplicate]

Lightning is an abundant source of energy.It is clean,huge and renewable.Is there any way to collect the energy from lighting,store it and reuse later?
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2answers
238 views

Solving the biggest problem of relativistic interstellar spacecrafts

In FTL-free universes, interstellar travel is often done by vessels capable of continuous acceleration (the drives themselves are often magitech), which can use the effects of relativistic time ...
5
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3answers
172 views

How to protect oneself against strong magnetic fields?

Spacecraft in my Scifi setting use strong magnetic fields for many purposes. Fusion containment, magnetic nozzles, gauss guns, magnetic fields as pusher-plates for nuclear pulsed propulsion and ...
2
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3answers
99 views

Viability of using temperature difference to generate energy on a tidally-locked planet

In Larry Niven's Ringworld, the Outsiders lie with one half of their body in the shade and one half of their body in direct sunlight and use the temperature difference to generate energy. Would this ...
2
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4answers
345 views

What kind of faster-than-light travel is this and is it at least plausible?

I've had a fairly complex world built up in my head for several years and finally writing a story in it. One thing I'm struggling with is explaining the galaxy's faster-than-light traveling. It's not ...
2
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2answers
178 views

Which of these changes to physics will have the least effect on earth’s biology?

The sol system has entered a region of space where the laws of nature are slightly different. It will experience different physics for 3 years, then things will return to what we know now. Which of ...
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2answers
124 views

Finding magic by repeating an experiment over a magical limit of the universe

Definition: Scientific laws or laws of science are statements that describe or predict a range of natural phenomena. A scientific law is a statement based on repeated experiments or observations that ...
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3answers
145 views

Is it possible to surf on molasses?

I recently came into possession of a rather large mass of molasses due to a misunderstood Alexa inquiry and since the restocking fee is outrageous, I plan on using it to answer a nagging question I've ...
1
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1answer
93 views

How much energy would a character need to disassemble and reassemble thier matter?

I wanted to have characters that can control energy and matter, so Dr Manhattan came to mind as a great example of a character that does that. Information on him says that he has complete awareness ...
4
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1answer
89 views

How might a scaling “force field” work?

To Whom It May Concern; I'm going to be blunt: I'm terrible at formal letters. I've just recently arrived at our new home. I find it amazing! The city design leaves something to be desired, but I ...
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2answers
111 views

Mirror to the past

Are there any holes in the following reasoning? Black holes form gravitational lenses. So they bend light. Is it possible for an observer to see his own past image as a result of light bending around ...
1
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1answer
168 views

Hidden specks will blow up the world if overheated: how bad a thing is this?

I'd encourage you to take about 4 min to read the whole post. Multiple masses of parabanic acid appear at random around the world (but see Context and constraints), displacing any matter in their way ...
2
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1answer
62 views

'Air' in Space & Planetary Rotation

I recently heard that before anyone had begun to build practical aircraft of any kind, it was thought by some that once flight was achieved you would be able to simply fly to another planet. The ...