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Index > Heap > ah, wanna ask about gravity, sound and magnet

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sleepsleep



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sleepsleep
i was thinking mixing tiny magnetic powder into the water/fluid, then circle it with coil, the movement of water (idk how fast would it moves) would then generate current, am i right? my stupid brain only could produce such idea,

but the movement of water is really interesting,

idk how strong the force of water movement using above approach, but 1 meter width glass tube,? i guess the factor is in drastic cool and hot temperature? maybe.
Post 03 Apr 2014, 11:55
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matefkr



Joined: 02 Sep 2007
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matefkr
belove.

_________________
please someone retrieve the audiofile of the recording of my mightiest fart.


Last edited by matefkr on 03 Apr 2014, 15:21; edited 1 time in total
Post 03 Apr 2014, 15:18
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Dr F



Joined: 01 Apr 2014
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Dr F
well. current times voltage equals performance given off some sais.

i have no idea.

u have some sorta force for magnets at a 2 mm distance, basicly the levle of precision u can surely hold with homemade things maybe 1 mm distance the strangth of magnet at this point, is capable to excerting some force, on some objects, so this is the overall force u can get out no more for sure less then this, thereby u just need to know the mass of whole magnetic material plus probbly its kidna less.. so u get some force and u can compare this force to the force possibly excerted by something else or somehow switch it to watts as watt is performance, force is newton.

and basicly this is what u would be interested about anyway.


i think performance watts equals voltage multipleid by current, and the current is a product of voltage divided by resistance.. .. although everything has some level of resistance, and things of some width may heat up if an ammount of current flows through these.


but not sure why u need it, since 3 phase generators for instances work just like this, with liquid bearings or even magnetic bearings and perhaps vacuum for eliminating most of resistance/friction.

_________________
please someone retrieve the audiofile of the recording of my mightiest fart.
Post 03 Apr 2014, 15:20
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gens



Joined: 18 Feb 2013
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gens
sleepsleep wrote:
i was thinking mixing tiny magnetic powder into the water/fluid, then circle it with coil, the movement of water (idk how fast would it moves) would then generate current, am i right? my stupid brain only could produce such idea,

but the movement of water is really interesting,

idk how strong the force of water movement using above approach, but 1 meter width glass tube,? i guess the factor is in drastic cool and hot temperature? maybe.


that's why i linked the drinking bird

you need thermal expansion of water (to get the density), gravity and maybe something about pressure

you could do it with very low efficiency (i guess, maybe i'm wrong)
stirling engine is more efficient in converting heat to something else

funny story
so Einstein was at this formal physicist party
lots of great minds to talk to, but there was a drinking bird there and couldn't figure out how it worked
that bothered him for days Smile
Post 03 Apr 2014, 15:49
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sleepsleep



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sleepsleep
thanks gens,
will use my time to understand that,
thinking feel so good! =)
Post 04 Apr 2014, 06:45
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sleepsleep



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sleepsleep
the magnetic field is simply too awesome.
Image
Post 21 May 2015, 03:35
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sleepsleep



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sleepsleep
i found it damn hard finding words to ask a question.
please allow me to quote some definitions.

http://en.wikipedia.org/wiki/Electric_current
Quote:
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire.


does electrons really move? or they all just standing up and down doing mexican wave?

http://en.wikipedia.org/wiki/Magnetic_field
Quote:
A magnetic field is the magnetic effect of electric currents and magnetic materials.

is this magnetic field static?
what i mean here is, if one take a subatomic or subsubsub atomic view on the magnetic field, does the field keep on moving to maintain the field, or it just static, without anything moving?

http://boomeria.org/physicstextbook/ch20.html
Image
In 1831 Michael Faraday discovered that cutting a magnetic field with a conductor will induce emf. Ah, the electric generator.

my question, if the magnetic field (is something subsubsub atomic ah hem that keep on moving to maintain the field), then placing a conductor in magnetic field should induce emf without "movement" to cut a magnetic field, am i right?

so what exactly is the magnetic field? (or magnetic effect) in a subatomic view?
Post 21 May 2015, 05:35
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revolution
When all else fails, read the source


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revolution
sleepsleep wrote:
does electrons really move? or they all just standing up and down doing mexican wave?
Apparently they do move. Although they do it very slowly on the order of centimetres per second. The wave that carries the current travels much faster at near c.
sleepsleep wrote:
is this magnetic field static?
Yes.
sleepsleep wrote:
what i mean here is, if one take a subatomic or subsubsub atomic view on the magnetic field, does the field keep on moving to maintain the field, or it just static, without anything moving?
Static according to the theory.
sleepsleep wrote:
my question, if the magnetic field (is something subsubsub atomic ah hem that keep on moving to maintain the field), then placing a conductor in magnetic field should induce emf without "movement" to cut a magnetic field, am i right?
You need movement. A static field on a static wire induces no current. Else the Earth's magnetic field would be inducing current in every conductor. BTW that would also break various laws of physics if a static field could do work on a static object.
sleepsleep wrote:
so what exactly is the magnetic field? (or magnetic effect) in a subatomic view?
Don't know. There are other "fields" also. Electric fields. Gravity fields. etc.
Post 21 May 2015, 05:47
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sleepsleep



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sleepsleep
thanks revolution,
so that means, electrons are doing mexican wave and trying to move to exit door at the same time,

i got a thought experiment,
if a magnet be let to travel in great speed on a path,
and we put something that will attract or repel that magnet in the middle,
what would happened?

assume the field is static and able to catch up with the speed of magnet,
or field is not static and we got result like we saw lightning first, then only hearing its roars.

electric field, gravity field, and many more, why they are so unknown?
Post 22 May 2015, 06:46
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revolution
When all else fails, read the source


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revolution
sleepsleep wrote:
if a magnet be let to travel in great speed on a path,
and we put something that will attract or repel that magnet in the middle,
what would happened?
Then you get a maglev train.
sleepsleep wrote:
electric field, gravity field, and many more, why they are so unknown?
Because the things we can use to examine them are the same things we want to measure. Try using your thumb to measure the length of your thumb.
Post 22 May 2015, 07:00
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sleepsleep



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sleepsleep
so could the magnetic field keeps up with speeding magnet?
Post 22 May 2015, 19:40
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revolution
When all else fails, read the source


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revolution
Perhaps you would like to read about gravity and the precession of Mercury. Many articles talk about the speed of the gravity field, and could explain much better than I could. The same explanation will apply to the magnetic field.
Post 22 May 2015, 23:30
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sleepsleep



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sleepsleep
thanks revolution,
really appreciate.
Post 23 May 2015, 21:02
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