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/sci/ - Science & Math

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5497315 No.5497315 [Reply] [Original]

So what do you think? In theory does this make any sense - its something i thought about when i was like 15.

>> No.5497317

In both cases the liquid would stay stationary relative to the Earth.

>> No.5497322

Nothing happens,the water doesn't just magically stop spinning with the earth when you put it in a tube.

>> No.5497324

newton considered something similar to the second one. If you drilled a frictionless cylinder directly between any two points on earth and made an elevator capsule with wheels to roll down it, it would fall through to the other side in the same time as if you drilled between any other two points. gravity is useful like that

>> No.5497328

Why wouldn't it stay stationary as the earth span beneath it - i mean if the pipe went all the way around?

>> No.5497331

>>5497324

oh yeah i remember about that. I guess i thought if you had a hydro generator on the top of one point and used no energy to drain it out the other side you could set them up all over the place under the sea and use the weight to the sea water to create energy.

>> No.5497333

>>5497328
For the same reason if you jump in a bus you don't get smashed into the back wall of the bus. The pipe is not exempt from the spinning momentum any more than the Earth is.

>> No.5497338

>>5497333

i understand that but if it where a continous flow - what it doesn't change anything?

>> No.5497343

>>5497338
What do you mean by continuous flow? The liquid will eventually settle down unless you move it with external energy.

>> No.5497344

>>5497338
Put a ball on your table.
Did it roll off to the west?

Neither will the water.

>> No.5497352

>>5497315
in scenario one, the liquid would not move relative to the earth due to inertia.

in scenario two, the liquid would likely show some dampened oscillation until it settled in the region of the tunnel closest to Earth's center. Either that, or depending upon the liquid and the size/material of the tunnel, the liquid may vaporize during the fall.

>> No.5497356

What i mean is...wouldn't the weight of the water and the lack of resistance in either direction cause it to flow in one direction as gravity acts on it.

>> No.5497362

>>5497356
The water isn't lacking resistance. It's pushing down against gravity and against itself. Does your water typically spin in your water glass, or go flying out at the 500mph(?) that the earth is moving below you?

>> No.5497369

The water would technically move at the constant velocity of the earth but due to relativity it would appear to be moving still, as everything else on earth that doesnt have force applied to it

>> No.5497370

lol. i know what you are saying but it seems like if you put it in a tube going all the way into a circuit it would act differently than normal. it doesnt have to be water... if it where a very light element your saying it would still be stationary unless force where applied. is there no was to gain energy from this idea - like multiply up using the earths spin?

>> No.5497371

>>5497315
If the liquid moved at all, it would slow down the Earth's rotation. Not fun.

>> No.5497376

>>5497370
Let's look at this another way. Why don't the oceans just cover the earth, flying over the surface at the spin speed?

>> No.5497377

Jesus, you're a fucking idiot. Ever heard of Newton's laws? Ever wonder why water in a car doesn't go everywhere? Fucking idiot.

You should get checked for mental retardation.

>> No.5497380

Here's some ways to legitimately (theoretically) get energy from the Earth's spin:

Build hydroelectric generators in places with large tidal currents (this is possible and has been done)

Build a large shaft extending from the Earth's core to the moon. As the Earth's spins, the shaft rotates about the center. Use an AC generator to make electricity (this is essentially impossible, but doable in theory).

Both of these use the moon. What if you don't want to use the moon, and solely rely on the Earth's spin? Technically speaking, a wind farm in a hurricane generates electricity from just the Earth's spin, since hurricanes are powered by the Coriolis effect, due to Earth's spin alone.

In any case, what you're thinking of doesn't make sense. Nothing just "wants" to stop. Everything's already moving as fast as the Earth's rotating, and trying to slow it down would take a huge amount of energy. Why do you need a pipe? Why aren't the oceans crashing onto East coasts and falling away from West coasts? Why would being enclosed in a pipe actually do anything? It's just a shell after all.

>> No.5497390

ITS IN A PIPE !!!! lol its just the earths spin effects the wind so i figured there where other ways to concentrate the spin and gain energy.

>> No.5497397

>>5497371

this

this is why the number of dams built has dropped dramatically.

by damming up water you are creating a huge weight on one side of the earth. multiply this by the fuckton of dams on the earth and you have created s situation that slows the rotation

similar to a figure skater extending her arms out as she spins. the further out the arms, the slower she spins.

>> No.5497400
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5497400

>> No.5497404

>>5497390
No. Temperature and pressure affect the wind, not the spin of the earth. weather is caused by the sun.

>> No.5497409

i accept defeat.

>> No.5497413

ITT we educated 3rd graders.

>> No.5497487

>>5497331
>use the weight to the sea water to create energy.

There's an idea actually and you don't even need to drill anything. Though it would displace a massive amount of deep sea water into the upper ocean over time.

>> No.5497494

>>5497315
Here's a better question:

If we build a pipe as in scenario one, filled it with water, and somehow generated enough energy to make it flow in the direction opposite the earth's rotation, could we stop/reverse the rotation?

>> No.5497509

>>5497487

by all means keep this thread going :P

>> No.5497576
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5497576

>>5497397

>> No.5497592

>>5497576

moment of inertia

>> No.5497615

>>5497397

Have you ever considered that maybe the reason why dams aren't built that much is because it changes the water resources downstream and floods the land behind it?

>> No.5497621

>>5497494

no

>> No.5497671

>>5497315
>its something i thought about when i was like 15.

Since its something you thought of when you were 15 I wont condescend you but I urge you to delete this thread.