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Jas
Nivel 5


Age: 33
Joined: 19 Feb 2009
Posts: 180

Carrera: Informática
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PostPosted: Wed May 04, 2011 12:19 pm  Post subject:  [Pedido] Primeros parciales tomados en 2010 Reply with quoteBottom of PageBack to top

alguien tiene primeros parciales que se hayan tomado en el 2010 para pasarme?
(en lo posible, los de la primera oportunidad, los que hace el dpto de fisica)


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el_milo
Nivel 7


Age: 36
Joined: 19 Mar 2007
Posts: 365
Location: Caá Ballito
Carrera: Civil and Informática
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PostPosted: Wed May 04, 2011 12:59 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

Este es para vos.... :P

Image

Tengo uno nomás.


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matthaus
Nivel 9



Joined: 27 Feb 2009
Posts: 953

Carrera: Industrial
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PostPosted: Wed May 04, 2011 1:37 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

gracias


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Jas
Nivel 5


Age: 33
Joined: 19 Feb 2009
Posts: 180

Carrera: Informática
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PostPosted: Wed May 04, 2011 7:59 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

gracias!


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leandrob_90
Nivel 9


Age: 34
Joined: 17 Aug 2009
Posts: 1586
Location: Mundo de los Ryuo Shin
Carrera: Mecánica
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PostPosted: Wed May 04, 2011 8:20 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

buscá en el subforo de física II que hay unos cuantos...

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leandrob_90

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¿Qué te pasó foro? Antes eras chévere.

Por un ping-pong libre, popular y soberano.

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matthaus
Nivel 9



Joined: 27 Feb 2009
Posts: 953

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PostPosted: Thu May 05, 2011 11:20 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

como resolveriais el 2??


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gedefet
Nivel 9


Age: 34
Joined: 06 May 2008
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Carrera: Electrónica
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PostPosted: Thu May 05, 2011 11:41 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

Sacale R6 y miralo bien...es un circuito que ya conocés

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Problemas con matemática? Llamá gratis al 0-800-3x²±sen(1/n³)∫∆ƒ dx

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matthaus
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Joined: 27 Feb 2009
Posts: 953

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PostPosted: Thu May 05, 2011 11:46 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

gedefet wrote:
Sacale R6 y miralo bien...es un circuito que ya conocés


ese ya pude, pero es el 3 :P

mi problema es el 2.

calcular el campo para r menorR1 me da el dato de rho? me queda A = 4/3 r rho

para r entre R 1 y R2 es 0

r mayuor a R2 supongo D cte y es como siempre..


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Snajdan
Nivel 5



Joined: 21 Oct 2009
Posts: 191
Location: Banfield.
Carrera: Química
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PostPosted: Fri May 06, 2011 12:28 am  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

Para el parcial del sabado entran materiales magneticos?

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SNAJ.

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Snajdan
Nivel 5



Joined: 21 Oct 2009
Posts: 191
Location: Banfield.
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PostPosted: Fri May 06, 2011 1:31 am  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

En al esfera del dielectrico me dio D=(3.A.epsilon0)/4 (???)

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matthaus
Nivel 9



Joined: 27 Feb 2009
Posts: 953

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PostPosted: Fri May 06, 2011 10:22 am  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

por? si el dato es que para r<R1 E = Ar r^

entonces medio lineal isotropo y homogeneo

D=e0erE

entonces D=e0erAr r^


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Snajdan
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Joined: 21 Oct 2009
Posts: 191
Location: Banfield.
Carrera: Química
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PostPosted: Fri May 06, 2011 11:46 am  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

Como sacaste el D afuera del conductor?

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SNAJ.

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matthaus
Nivel 9



Joined: 27 Feb 2009
Posts: 953

Carrera: Industrial
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PostPosted: Fri May 06, 2011 12:31 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

esa es mi duda.. para mi tomas D cte

r>R2

osea D .S = rho 4/3 pi R1^3 (vol de la esfera cargada)

con S = pi r^2

la unica "incognita" es rho..


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matthaus
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Joined: 27 Feb 2009
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PostPosted: Fri May 06, 2011 2:15 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

rho se saca de hacer la divergencia de D.


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connor
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Age: 38
Joined: 30 Jan 2010
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PostPosted: Fri May 06, 2011 5:35 pm  Post subject:  (No subject) Reply with quoteBottom of PageBack to top

Para sacar afuera podes aplicar la ley de gauss, pero para la misma necesitas la carga en el interior, que solo hay en el dielectrico, y como vos sabes cuanto vale D dentro del dielectrico, podes obtener rho libre, integras en el volumen y tenes la carga libre, como bien decis, rho libre = div D, espero haber ayudado en algo, saludos

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[tex] \phi (\overrightarrow r ) = \int\limits_V {{d^3}\overrightarrow {r'} \;G(\overrightarrow r ,\overrightarrow {r'} )} \;\rho (\overrightarrow {r'} ) - \frac{1}{{4\pi }}\oint\limits_S {{d^2}\overrightarrow {r'} } \;\frac{{\partial G(\overrightarrow r ,\overrightarrow {r'} )}}{{\partial \overrightarrow {n'} }}\;\phi '(\overrightarrow {r'} ) [/tex]

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