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El vaso que se calienta solo https://curiosoperoinutil.com/forum/viewtopic.php?f=2&t=2458	Página 1 de 3

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Autor:	J Glez [ Lun 25 Dic 2006, 19:17 ]
Asunto:	El vaso que se calienta solo

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Autor:	arjwinzip [ Lun 25 Dic 2006, 19:53 ]
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Autor:	J Glez [ Lun 25 Dic 2006, 20:16 ]
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Autor:	Iserp [ Lun 25 Dic 2006, 20:16 ]
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Autor:	Iserp [ Lun 25 Dic 2006, 20:18 ]
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Autor:	Maden [ Lun 25 Dic 2006, 21:36 ]
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Autor:	un estudiante [ Lun 25 Dic 2006, 22:36 ]
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Autor:	Pipistrellum [ Lun 25 Dic 2006, 22:50 ]
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Autor:	dexther [ Mar 26 Dic 2006, 00:10 ]
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Autor:	J Glez [ Mar 26 Dic 2006, 00:21 ]
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Autor:	Pipistrellum [ Mar 26 Dic 2006, 00:52 ]
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Autor:	Davidmh [ Mar 26 Dic 2006, 18:08 ]
Asunto:
Idea: La presión que ejerce el vaso lleno sobre la mano es mayor que la del vaso vacío. Así, los termorreceptores de la piel, situados en la parte más externa de la piel, quedan ligeramente inhibidos, ergo su capacidad de identificación del calor es menor. Sobre lo del vaso y la cucharilla, naranjas(¡!). Yo no lo he notado, aunque tomo el té en tazas de cerámica. Por el asa. En cuanto a lo de las camareras, lo que pasa es que el vaso ha absorbido una determinada cantidad de calor que dependerá del producto de la diferencia de temperatura, la masa y el calor específico. Cuando viertes el café por primera vez en el vaso, este absorbe parte de su calor, enfriandolo. Al verterlo por segunda vez, se repite el proceso. Y un consejo, J Glez , aquí no somos seres crueles y despiadados. No hace falta que pidas disculpas a cada mensaje que envías. Y nuetro tiempo está consagrado a CPI y sus acólitos y otros seguidores.

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Autor:	chemist [ Mar 26 Dic 2006, 18:13 ]
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Autor:	Davidmh [ Mar 26 Dic 2006, 18:54 ]
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Autor:	chemist [ Mar 26 Dic 2006, 19:11 ]
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Autor:	ocularis [ Mar 26 Dic 2006, 19:21 ]
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Autor:	Davidmh [ Mié 27 Dic 2006, 12:00 ]
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Autor:	EvilWolf [ Mié 27 Dic 2006, 14:56 ]
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Autor:	ocularis [ Mié 27 Dic 2006, 16:13 ]
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Autor:	J Glez [ Mié 27 Dic 2006, 19:43 ]
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Autor:	ocularis [ Mié 27 Dic 2006, 20:10 ]
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Autor:	Pacoga [ Mié 27 Dic 2006, 21:17 ]
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Autor:	rmcantin [ Mié 27 Dic 2006, 22:36 ]
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Muchas hipotesis pero no veo una que tenga en cuenta todo el sistema, que es: Mano (solido - polimeros) Vaso (solido - ceramicas) Cafe (liquido) Aire (asumimos gaseoso en conjunto) peroooo... hay uno mas... Vapor de agua (gaseoso) Acaso no veis el "humillo" que sale de un cafe caliente? Ese "humillo" siempre va hacia arriba, asi que cuando se vuelca el vaso, se vacia de cafe liquido, pero se llena del vapor de agua que evapora. Ese vapor de agua, al contacto con la pared del vaso mas fria, condensa y se forman gotitas. Los procesos de cambio de estado (en este caso de gaseoso a liquido) son, por normal general, los procesos que mas transferencia de calor producen. Por eso se produce el cambio de temperatura y por eso es subito. La proxima vez, prueba a coger el vaso por la parte de debajo y veras como no quema.

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Autor:	Davidmh [ Jue 28 Dic 2006, 00:55 ]
Asunto:
Sencillamente brillante, rmcantin. Esto es lo fantástico de la ciencia: tenemos la solución delante de nuestras narices, es muy sencilla, pero nos complicamos enormemente hasta que un halo de luz nos acerca a la verdad. O al menos a una relativa verdad, que nunca se sabe. Después de este peloteo, el "humillo" que sube no es vapor de agua (que nadie me muerda por el subrayado). Quizá vaya junto al vapor de agua, pero eso es vaho. Ahora bien: ¿cuál es la temperatura máxima del vaho? Nueva pregunta CPI que seguro me sabéis contestar con presteza, amables CPIeros.

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Autor:	chemist [ Jue 28 Dic 2006, 00:58 ]
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Autor:	chevron14 [ Jue 28 Dic 2006, 01:07 ]
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Autor:	J Glez [ Jue 28 Dic 2006, 01:08 ]
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Autor:	J Glez [ Jue 28 Dic 2006, 01:09 ]
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Autor:	chevron14 [ Jue 28 Dic 2006, 01:22 ]
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Autor:	ocularis [ Jue 28 Dic 2006, 01:29 ]
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