/sci/ - Science & Math

[Anonymous No.10595577]

When you close scissors theoretically the point where its closing moves faster than (c).
What is theoretical maximum speed of a propeller inside a vacuum? And does it work in a similar fashion as the scissor thingy?

[Anonymous No.10595593]

Nigger what ungodly fucking concoction of hallucinogens are you smoking and can I have some?

[Anonymous No.10595601]

Huh?

[Anonymous No.10595610]

>>10595593
>>10595601
I'm going to interpret OP's retardese as:
If you had a giant pair of scissors in space, and you started closing them together so that each blade was moving close to the speed of light. The point where the blades intersect would move along the length of the blade, to the end, faster than the speed of light.
Which is fine, because no "thing" is actually moving faster than light.

[Anonymous No.10595611]

>>10595593
I wish i had some, plan on making my own DMT anyways. I hear its surreal.
Yall tried it before?

[Anonymous No.10595614]

>>10595577
I think vsauce did a video which tackled something like this.
https://youtu.be/Do1lm9IevYE
At the end.
I think it would be the same princible.

[Anonymous No.10595616]

>>10595614
Why do people watch this soi?

[Anonymous No.10595621]

>>10595611
Don't be dumb about it, read as much as you can on the nexus first, dont harvest from living trees in a manner that could kill them, dont cut corners in the process, use glass, check the solvent for residues, dont sell.

[Anonymous No.10595624]

>>10595610
This exactly but i already knew the part u answered.
Suppose we have a giant room with vacuum, and you have a huge knife. Since we can abuse leverage it could move fast because a tiny amont of change in would move the far end a lot. Now, what is the fastest the far end of the blade could move?

[Anonymous No.10595626]

>>10595616
Trivial knowledge i suppose?
>>10595621
Thanks, i don't mean to sell it. Just looking for an out of this world experience.

[Anonymous No.10595630]

>>10595616
Because he explains concepts of science which interest people in laymans terms?
I would argue anything that encourages scientific thought should only be praised these days.

[Anonymous No.10595633]

>>10595624
Speed of sound

[Anonymous No.10595636]

>>10595633
Why? Why could it not move faster?

[Anonymous No.10595637]

>>10595577

https://en.wikipedia.org/wiki/Ehrenfest_paradox

solution is "no rigid material in the universe would allow for such a case"

the max speed of anything is always the velocity of light in a vacuum.

[Anonymous No.10595638]

>>10595633
Brainlet. There is no drag in vacuum, therefore no sound barrier to break.

[Anonymous No.10595640]

>>10595637
Thanks, lets get to reading lads?

[Anonymous No.10595671]

>>10595637
But the movement of the material still requires p waves to travel from one end to the other.
Hence speed of sound.

[Anonymous No.10595681]

>>10595671

waves don't move material points.

[Anonymous No.10595683]

>>10595638
Speed of sound is not exclusive to travel through gases it is the speed of which a wave travels through a medium, like the wave that would initiate on one end of the scissors and have to reach the other once you move it.

[Anonymous No.10595688]

>>10595681
What does then?

[Anonymous No.10595716]

>>10595624
You can use this effect to hyper accelerate a payload.
It's like a rail gun, but instead they're a series of electromagnetic scissors that snap shut as the payload passes through, get enough in series, or a big enough field, and you could get yourself close to c.

[Anonymous No.10595721]

>>10595683
Exactly this.

[Anonymous No.10595751]

>>10595577
First of all,for most scissors, no it doesn't, even palming the card you just palmed about what is actually moving.

The "scissor problem" is similar to yhe "searchlight problem" -- if I pan a searchlight bean across the moon (probabky some sort of laser to prevent beam spreading) does the beam move across the surface of the moon faster than the seed of light?

The mistake being made it believing there uis something moving along with the illuminated patch of light, or along the point where lines intersect with the blades of scissors.

There is not.

[Anonymous No.10595762]

>>10595633
Tghis incorrect answer is based on the "if I tap a stick that is a lightyear long, how long until the tap is felt at the other end. That answer to THAT one is "the speed of sound in the stick."

Swinging something laterally can break the local sound barrier -- ever crack a whip?

The answer to >>10595624
is that you could approach the speed of light, but not reach or exceed it. You'd reach the point were the amount of energy you'd have to put in to move it any faster would approach the infinite -- and somewhere in along there the structural integrity of your knife would break down.

[Anonymous No.10595800]

>>10595593
I would like to do hallucinogens at a /sci/ meetup

[Anonymous No.10595872]

>>10595762
You're the second person to mention the sound barrier in this fashion. Breaking the sound barrier is an object moving quicker than the speed of sound can travel through the same medium (in your example air). The whip has its own speed that sound can travel through it and its faster than the air around it can transport the wave.
In space the scissors are not limited by any thing but the speed of which the wave can travel through it (like the whip).
Remember the speed of sound is not a constant, it is relative to factors like what medium it travels through.

[Anonymous No.10595908]

>>10595577
Let a superrelativistic velocity be any motion that exceeds the rate at which gravity waves propagate across a virgin spacetime.

Let b be the period of one such wave, expressed as 1 since we haven't defined the measure of space, and we already have the concept of a wave to calibrate our measure by.

Let n be a forced-dimensional object of radius ~1.2b, and no capacity to rotate.

n is necessarily constructible given known laws of physics, because such an object would be relative to itself non-rotating. Now, this object will still have the capacity to conduct sound waves, but we can never observe a sound wave traversing an object faster than the speed of GRAVITY WAVES ARE THE SOUND OF ONE HAND CLAPPING.

Q.E.D.


The actual proof is left as an exercise to the black hole generated by the inability to cross the relativistic horizon you created, you fucking jackass.

[Anonymous No.10596089]

>>10595872
But none of that is relevant to OPs question about closing scissors. However long it took the scissors to get up to speed as the impetus to move swept along the blades at the speed of sound in a scissor blade, at some point they'd be moving, and the scissors would be closing.

OP postulates that the point where they cross could be "moving" faster than the speed of light. This is true, but ignores the fact that notheing moves along the points where the blades cross -- no bit of scissor, nor of anything else, is moving faster than light.

Similarly, I can aim a laser at the moon and pan it in such a way that the "dot" of light (if you could detect it at all) would move across the moon 's surface fater than the speed of light. Which it could, but again there is nothing that travels along with the illuminated dot, nothing is moving faster than light -- certainly not the light from the laser, which ic traveling from my laser to the moon then bouncing off the moon aso I can watch it . No photons travel along the lunar surface making up a moving patch of light.

[Anonymous No.10596115]

>>10596089
So the speed of sound in a material is just the relativistic rigidity if it were a light year long and any force were applied?

[Anonymous No.10597390]

>>10595616
because he spoonfeeds basic science and questions you could answer in a simple google search to brainlets

[Anonymous No.10598720]

>>10595611
copying a post a guy made on a depression thread:

First you have to understand the root cause of depression, and this mostly have to do with the way in which we live our lives: https://www.youtube.com/watch?v=drv3BP0Fdi8

Not always, of course, but often.

Second, a healthy diet and exercise should be the default for you.

Thirdly, the best medicine against depression is not some SSRI, but rather ayahuasca: https://edition.cnn.com/2018/07/03/health/ayahuasca-depression-study-partner/index.html

This is a naturally occurring anti-depressant combined with the strongest psychedelic on the planet. It is also perfectly legal and dirt-cheap. Here is where to buy it: https://maya-ethnobotanicals.com/herbs/by-category/ayahuasca

And here is how to use it: https://www.dmt-nexus.me/forum/default.aspx?g=posts&t=52019

This is what you need: 250g Syrian rue, 250g chaliponga, a blender or a mixer, and a 0,1g scale. This supply should also last you at least a year.

First you take 2,0g powdered Syrian rue and swallow with water. Then you wait 10 minutes. Then you swallow 3,0g powdered chaliponga. The trip starts ~30-60 minutes after swallowing the Syrian rue, and ends after roughly 6 hours. On such a dosage, it will not be overwhelming, but also sufficient to show you how totally awesome your life can be. This is just anecdotal from my end, but I know many, many people who were cured from depression, and sometimes severe depression, from doing this.

Of course, if you do not want to take it on your own, you can always go to Peru and take it at an ayahuasca retreat of some kind. Like this doctor did: https://www.youtube.com/watch?v=YqsdCqKQCLU

[Anonymous No.10599065]

>>10595577
The fuck are you smoking?
No, it does not move faster than the speed of light. You'd need an infinite amount of energy to approach that.