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/sci/ - Science & Math

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4795423 No.4795423 [Reply] [Original]

if we had two portals, one in the ground the other in the roof then you'd fall in it forever yeah, but you'd reach terminal velocity bcuz air resistance

but what if we put them like that in a vacuum? then you'd accelerate forever? how fast would you get?

>> No.4795428

>>4795423
Theoretically, you would reach the speed of light

>> No.4795429

You'd accelerate asymptotically towards c.
Depending on the gravity, you would be falling close to the speed of light in a certain amount of time.

>> No.4795433
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4795433

>>4795428

>> No.4795434
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4795434

>>4795428
>approach
Ftfy, namefag

>> No.4795448

>>4795423
terminal velocity doesn't depend on air resistance

>> No.4795462
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4795462

>>4795448
>>4795448
>>4795448

>> No.4795461

>>4795428
you can't go at the speed of light

>> No.4795465

>>4795448
>air resistance
derp derp

>> No.4795467

>>4795465
as in, you would also reach terminal velocity in a vacuum. and it wouldn't be anywhere near the speed of light

>> No.4795468
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4795468

>>4795461
>>4795434
>>4795433
> can't go the speed of light

No shit, theoretically anything is possible if you want to get down to it.

>> No.4795471

Also, if you were enough of a vacuum to defeat terminal velocity, you would die, barring any life support systems

>> No.4795483
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4795483

>>4795471
>>4795468
>>4795467

Sure is summer in here

>> No.4795494

People always forget that air will also 'fall' through the portal.

So simply having two portals in the same room at different altitudes would be pretty windy.

Right?

>> No.4795500

>>4795471
no shit, i said me, but it could be anything, like a coin

>> No.4795664

>>4795468

No. It's not "theoretically anything is possible". The speed of light in a vacuum is an absolute and the only thing that can go at that speed is a massless particle or wave. Any object with mass can only approach the speed of light, but no matter how much energy is applied to it for how long, it will never go exactly the speed of light.

>> No.4795853

>>4795664
> nothing absolute
We only have theories, we only understand so much of the world, universe and how it works, who is to say that light is the only thing that can move that fast? Maybe we just arn't to the point where we can achieve it yet, stop being so closed minded

>> No.4797699

Portals are transportation devices that break the FTL limit by design: if you jump into one portal, you will immediately get out of the other one in not more time that it would take to jump out of window, even if the other portal is freekin Horse Head Nebula, and you're on Earth.
You just traveled lightyears in a second.

>> No.4798004

>>4797699
Its because the portals open extradimensional holes which treat our 3-D world as something that can be circumvented like bending a piece of string.

>> No.4798070

You would infinitely get closer to the speed of light (3.0x10^8 m/s)

>> No.4798100

You would go over the speed of light. It wouldn't be asymptotic because there would be nothing to slow you down.

People saying you can't go the speed of light don't realize that portals aren't real. This would probably be a reason for them not being real. If portals exist in this hypothetical universe, then the speed of light probably doesn't exist because clearly there is a way to go any speed you want.

>>4795448
What does it depend on then? What is the force that is acting counter to the direction of falling?

>> No.4798111

>>4798100

The fabric of spae-time would slow you down. The mass of your body at that speed would crate a drag on the space-time, making you infinitely dense and infinitely attractive gravitationally.

>> No.4798114

>>4795428
no.png.rar

you would continually accelerate until you exceeded your chandrasekhar limit, formed a singularity, and emitted a phenomenal pulse of energy in the form of light.

>> No.4798125

I think we're making a big assumption here. Going through portals does not occupy time and hence does not occupy speed.

Think of magic teleportation. You disappear in one place and appear in the next. It just happens, it's just magic. There's no movement, no speed, no time.

So before we talk about FTL and whatnot, realize that portals include no distance to travel nor time to pass.

>> No.4798132

>>4798125
he means repeatedly falling through the bottom portal, coming out the top with more gravitational potential, and accelerating some more. Effectively the same question as "if you kept falling in a vacuum forever, what would happen?"

>> No.4798148

>>4798100

What is a wormhole?

>> No.4798157

>>4798148
>He thinks space is euclidean
>laughingtheoreticalphysicists.gif

>> No.4798163

>>4798157

How did I imply that? I'm merely saying that it is hypothetically possible to use the portal concept but I see it being difficult to employ outside the quantum level.

>> No.4798170

>>4798163
>I linked to the wrong post
>disappointed_parents.rar

>> No.4798175

>>4798170

No harm done, I even laughed a good deal more than I should have on the filename thing on both occasions.

>> No.4798596

You would get as close to ligt speed as possible and then time for you and only you would slow down by a huge ammount. If you were to be replaced by a clock and you could observe it it would seem ro be at a standstill maybe it would be.

>> No.4798626

>>4797699
>>4797699
>>4797699
>>4797699
>implying going through a portal is the same as traveling through spacetime
Retard

>> No.4798631

Wait a minute, can you have gravity without air resistance?

>> No.4798641

>>4798631
Wait a minute, can you have electricity without triphase turbines?

>> No.4798661

>>4798631
9/10

>Clap, Clap

>> No.4798663

Understand that light travels the speed it does because of the imperfect nature of the vacuum in space. If you had a truly perfect vacuum, which would be essentially impossible (but hey, so are portals), you would continue accelerating indefinitely.

>> No.4798748

>>4798631
>you now realize the air conducts the gravity, much like a soundwave
>which is why there is no gravity in space

>> No.4798753

>>4798748
I believe space is filled with something called "ether" which also conducts gravity.

>> No.4798790

Why would you accelerate if no force is acting?

>> No.4798833

>>4797699
Velocity would be greater than the speed of light, speed would only approach it.

>> No.4798842

>>4798790
why do you think no force is acting? presumably there is gravity. or did you think gravity requires air? hurrr.

>> No.4798844

>>4798790
He isn't in the vacuum of space, he is in a vacuum on Earth.

>> No.4798849

>>4798833
hurrr

that makes no sense. you can't have velocity 'greater than' (presumably you are talking about the magnitude of the velocity) c and speed less than c, they are the same number.

>> No.4798856

Well OP. Why don't you conduct an experiment and find out?

Oh wait, portals are VIDEO GAME MECHANICS. Why don't you go fuck yourself for bringing this to a science board?

>> No.4798857

I don't think you do move infinitely fast when you move through a Portal. Distance is defined as the length of the shortest path between two points (this is the definition of a metric); hence there isn't actually any distance between one side of the portal and the other, as the shortest distance is through the portal.

>> No.4798858
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4798858

>>4798849
I hope you're trolling, I really do, because if not, please delete this post and look up what velocity is, and what speed is.

>> No.4798863

>>4798856
> science
> NO THOUGHT EXPERIMENTS FFFFUUUU SO MAD

you are austic. additionally, you would make a shit-tier physicist. einstein is laughing at you.

>> No.4798876

>>4798849
Lets say you run a lap on a circular track, and say, this track is 400m long.

If you run one lap in 40 seconds, your speed is 10m/s and your velocity is 0m/s. This is because speed is a measure of distance over time, velocity is a measure of CHANGE in distance over time.

>> No.4798872

>>4798858
...yes, speed is the magnitude of velocity. Velocity is a vector and speed is its length. Velocity can't be 'greater than' anything because vectors have no order. Thus the only sensible interpretation of your statement was that you were talking about the magnitude of velocity.

I hope this has helped you to understand extremely basic high school physics.

>> No.4798891

>>4795483
>Calling out summer on /sci/
Summerfags and newfags go to /b/, /v/, and /gif/, dumbass.

>> No.4798905

>>4798876
Lets say you travel through a portal, moving 1 lightyear in distance, and this trip takes 1 second. The distance between the two portal entrances is, say, 0.01 meters. Your velocity, the change in distance over time, is 1 lightyear over 1 second. A velocity of 1 lightyear/second. Your distance travelled through the portal is 0.01 meters over 1 second. This gives a speed of 0.01 meters/second.

>> No.4798913

>>4798876
This board is more retarded than I thought, good God

>> No.4798907

>>4798876
No, velocity is a measure of speed in a direction. Displacement is a measure of net distance travelled.

If you mean that the AVERAGE velocity would be zero you would be correct. But that's because you run a loop, not because you start in the same location you finish.

>> No.4798908

Wow, lots of shitposting in this thread. Surprising for such a simple question.

>> No.4798910

>>4798876
can't tell if trolling or just stupid

>> No.4798916

>>4798876
> If you run one lap in 40 seconds, your speed is 10m/s and your velocity is 0m/s.

troll or utter moron. don't care either way.

>> No.4798927
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4798927

>>4798876
>The norm of a non-zero vector is zero

>> No.4798952

>everybody responds the retarded, possible troll posts
>nobody responds to any of the logical posts

never change, /sci/