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/sci/ - Science & Math

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8354938 No.8354938 [Reply] [Original]

A string that's infinitely strong, weightless and one light year in length. If I pulled on it, would the other side (one light year away) move with it instantly?

>> No.8354946

>>8354938
you couldn't pull it if it were weightless

>> No.8354948

>>8354938
depends on how much slack it has

>> No.8354955

>>8354938
You can't just ignore arbitrary parts of physics without any consistency and then ask what would happen. The thing you described doesn't exist and the reason why they don't exist is kind of connected to why it wouldn't move instantly.

>> No.8354962
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8354962

>>8354938
False

a string one light year in length would have more atoms on the beach than there are grains of sand in the universe

Conservation of energy states that if you have two Einstein-Rosen Bridge balloons, as you increase the size of one, the other must decrease, therefore by analogy it is impossible to make any object the size of the speed of light.

>> No.8354980

>>8354962
haha ebin xddddd

>> No.8354991

>>8354938
> infinitely strong
you mean infinitely stiff?
rigid bodies cannot exist in relativistic physics.
This is one of the many paradoxes they lead to

>> No.8355001

>>8354991
what if we assume the stiffness is, say, doubly exponential in some parameters with huge hidden constant ?

>> No.8355023

>>8354938
>if i have an object that doesn't follow these laws of physics, will it follow these other laws of physics?

sure, why not? since apparently i can choose what does and doesn't happen

>> No.8355063

>>8354938
Nope.

You should read "Chemistry 1" and find out that matter is composed of atoms, which are connected by chemical bonds!

>> No.8355164

>>8355001
So basicly your mum

>> No.8355188

>>8354938
If it's massless then it's always moving at the speed of light

>> No.8355586

>>8354938

Longitudinal waves can't propagate through matter at anywhere near the speed of light. In fact, you probably couldn't get it to move all.

>> No.8355611

>>8354938
>weightless
you couldn't pull it because it'd already be moving away at the speed of light