{"id":7300,"date":"2022-02-04T09:00:00","date_gmt":"2022-02-04T12:00:00","guid":{"rendered":"https:\/\/professorpinguim.com.br\/blog\/?p=7300"},"modified":"2023-08-06T21:01:39","modified_gmt":"2023-08-07T00:01:39","slug":"resumo-sobre-dilatacao-termica-de-solidos-com-exercicios","status":"publish","type":"post","link":"https:\/\/professorpinguim.com.br\/blog\/resumo-sobre-dilatacao-termica-de-solidos-com-exercicios\/","title":{"rendered":"Resumo sobre Dilata\u00e7\u00e3o T\u00e9rmica de s\u00f3lidos com Exerc\u00edcios"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Fala, pessoal! Hoje vamos fazer alguns exerc\u00edcios sobre Dilata\u00e7\u00e3o T\u00e9rmica S\u00f3lidos, mas antes vamos revisar alguns assuntos importantes. Acompanhe!<\/p>\n\n\n\n<!--more-->\n\n\n\n<h2 class=\"wp-block-heading\">Dilata\u00e7\u00e3o T\u00e9rmica<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sempre que um corpo se dilata ou se contrai, a varia\u00e7\u00e3o ocorre nas tr\u00eas dimens\u00f5es do seu volume. Ou seja, toda dilata\u00e7\u00e3o \u00e9 volum\u00e9trica.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/YsF2MggEdtfLISmFs8018jkMerqraGtZYUAUpWR9XxGztwMbR-QAGVcIpcqwle7-RwVIbfUJ9o5R0Wiphv7TVx4_lhUyO8cd93V3OKwIt6M3hID23Ple3fDQ1biU2bQib2Uhow3J\" alt=\"Dilata\u00e7\u00e3o T\u00e9rmica\" width=\"399\" height=\"363\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Algumas vezes, por\u00e9m, estamos interessados na dilata\u00e7\u00e3o de uma ou duas dimens\u00f5es apenas, isto \u00e9, estamos interessados na <em>dilata\u00e7\u00e3o linear<\/em> (em uma dimens\u00e3o apenas) ou na <em>dilata\u00e7\u00e3o superficial<\/em> (em duas dimens\u00f5es apenas) do corpo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dilata\u00e7\u00e3o linear<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A dilata\u00e7\u00e3o linear \u00e9 de particular interesse quando lidamos com fios e barras cujo comprimento \u00e9 muito maior que as demais dimens\u00f5es ou quando estamos interessados apenas na dilata\u00e7\u00e3o em uma das dimens\u00f5es do corpo. Nesses casos simplesmente desprezamos a dilata\u00e7\u00e3o das demais dimens\u00f5es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Assim, tomemos uma barra homog\u00eanea cujo comprimento \u00e9 muito maior que sua altura ou sua largura (ou profundidade):<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/a45i2Crjy7SyyBUMzXIb6wQQ-hepwjQaTrEcmfdUGFtfBIafq9CYF_ez4-o1UTqzzUcpCstjPoOheDzRqGyPMSq17iP5rFaFaRTaXIcjUBXhr8PpqyJ40EP-mXS6lSo2l70lysaR\" alt=\"dilata\u00e7\u00e3o linear\" width=\"378\" height=\"266\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ao variarmos a temperatura da barra do valor inicial <sub>0<\/sub> at\u00e9 o valor final verificamos experimentalmente uma varia\u00e7\u00e3o&nbsp; em seu comprimento.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Experimentalmente verificamos que para determinada faixa de temperaturas a varia\u00e7\u00e3o&nbsp; no comprimento da barra \u00e9 diretamente proporcional \u00e0 varia\u00e7\u00e3o&nbsp; da temperatura, ao comprimento inicial L<sub>0<\/sub> da barra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> <img decoding=\"async\" width=\"400\" height=\"233\" class=\"wp-image-7305\" style=\"width: 400px;\" src=\"https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.16.41.png\" alt=\"\" srcset=\"https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.16.41.png 836w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.16.41-300x175.png 300w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.16.41-768x448.png 768w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.16.41-670x391.png 670w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Consideraremos os coeficientes de dilata\u00e7\u00e3o como constantes nos problemas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;A tabela abaixo traz alguns valores aproximados do coeficiente de dilata\u00e7\u00e3o linear m\u00e9dio de algumas subst\u00e2ncias:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><span class=\"has-inline-color has-very-dark-gray-color\">Subst\u00e2ncia<\/span><\/td><td><span class=\"has-inline-color has-very-dark-gray-color\">a (\u00b0C<sup>-1<\/sup>)<\/span><\/td><\/tr><tr><td>Vidro<\/td><td>8,0&#215;10<sup>-5<\/sup><\/td><\/tr><tr><td>Chumbo<\/td><td>2,7&#215;10<sup>-5<\/sup><\/td><\/tr><tr><td>Alum\u00ednio<\/td><td>2,2&#215;10<sup>-5<\/sup><\/td><\/tr><tr><td>Cobre<\/td><td>1,7&#215;10<sup>-5<\/sup><\/td><\/tr><tr><td>A\u00e7o<\/td><td>1,2&#215;10<sup>-5<\/sup><\/td><\/tr><tr><td>Concreto<\/td><td>0,9&#215;10<sup>-5<\/sup><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Dilata\u00e7\u00e3o superficial<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Uma chapa de metal bem fina dilata mais evidentemente em duas dimens\u00f5es. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"251\" class=\"wp-image-7306\" style=\"width: 650px;\" src=\"https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.19.11.png\" alt=\"\" srcset=\"https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.19.11.png 1206w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.19.11-300x116.png 300w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.19.11-1024x396.png 1024w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.19.11-768x297.png 768w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.19.11-670x259.png 670w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.19.11-1060x410.png 1060w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/>Um dos efeitos interessantes da dilata\u00e7\u00e3o \u00e9 a dilata\u00e7\u00e3o dos orif\u00edcios de um material. Em uma chapa met\u00e1lica, por exemplo, se fizermos um furo em sua superf\u00edcie ele dever\u00e1 dilatar como se estivesse preenchido pelo material que comp\u00f5e a chapa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dilata\u00e7\u00e3o volum\u00e9trica<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A dilata\u00e7\u00e3o volum\u00e9trica \u00e9 a dilata\u00e7\u00e3o real que os corpos apresentam. Nesse caso, nosso interesse est\u00e1 na varia\u00e7\u00e3o de volume do corpo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De forma semelhante \u00e0 dilata\u00e7\u00e3o linear e superficial, as express\u00f5es que d\u00e3o a varia\u00e7\u00e3o de volume de um corpo e seu volume final em fun\u00e7\u00e3o da varia\u00e7\u00e3o da temperatura \u00e9:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"300\" class=\"wp-image-7307\" style=\"width: 650px;\" src=\"https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.23.22.png\" alt=\"\" srcset=\"https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.23.22.png 1232w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.23.22-300x138.png 300w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.23.22-1024x472.png 1024w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.23.22-768x354.png 768w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.23.22-670x309.png 670w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/02\/Captura-de-Tela-2022-02-02-a\u0300s-17.23.22-1060x489.png 1060w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A dilata\u00e7\u00e3o de buracos no interior de corpos s\u00f3lidos tamb\u00e9m ocorre como a dilata\u00e7\u00e3o dos orif\u00edcios das placas.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Exerc\u00edcios resolvidos de Dilata\u00e7\u00e3o T\u00e9rmica<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. (Fmj) Uma barra de certo material, de comprimento 80 cm sofre uma dilata\u00e7\u00e3o de 0.01% em seu comprimento quando submetida a uma varia\u00e7\u00e3o de temperatura de 60\u00baC. Para que um bloco de 400 cm<sup>3<\/sup> do mesmo material sofra uma dilata\u00e7\u00e3o de 0.1% de seu volume, ele deve ser submetido a uma varia\u00e7\u00e3o de temperatura de<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>a) <\/strong>180\u00baC&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>b)<\/strong> 60 \u00baC&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>c)<\/strong> 20 \u00baC&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>d)<\/strong> 120 \u00baC&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>e)<\/strong> 30 \u00baC&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resposta:<\/strong> C<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Usando a porcentagem de aumento linear da barra determina-se a sua dilata\u00e7\u00e3o linear&nbsp; e o mesmo para a porcentagem de dilata\u00e7\u00e3o volum\u00e9trica&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/50joXzLPIx2bg0eT2s1qDwC4J-reUw1x99LkUyyD797_DU5HK8P5zOTMDqaHbdwsiMNsQXZBtIEAi06Gg-fipt8sN6zI-XK25v1_x2nrs4ovqJIu5JHYkPahNLU45c1wlkzPrClK\" width=\"245\" height=\"85\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Com a express\u00e3o da dilata\u00e7\u00e3o linear podemos determinar o coeficiente de dilata\u00e7\u00e3o&nbsp; do material da barra.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/auahnAyxSM7dfG9xdoNKfOr-p-QICzSwN7HDAyIfa21SutwIo0rTXn5XIWNwK232XPhqOu8fGpaRpGd-6s2cQpNmrcp9O5WcVct9oJRQTwGv8nYLIZfmxS_-wgVXDm2_zOmB_VgN\" width=\"478\" height=\"52\">&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Usando o valor do coeficiente de dilata\u00e7\u00e3o linear determinado, calculamos a varia\u00e7\u00e3o de temperatura para a mesma dilata\u00e7\u00e3o porcentual em volume.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" width=\"418\" height=\"106\" src=\"https:\/\/lh4.googleusercontent.com\/EeLaKvKxd2_c90HGe4LFlYCbtvnzFDl3nauWPBbO71LkvxRDSv_D-0i4zpILoatMMTLDQX-J9IuOiPx9povL9pN8hIVHnqfnsjgiZME5FOcfcPMsqTCK9oU5nUabyEtotR6hdvYD\">&nbsp;<\/h2>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. (Unicamp)&nbsp; A estudante ga\u00facha Juliana Estradioto, uma das vencedoras da 5\u00aa edi\u00e7\u00e3o do Pr\u00eamio Donna, ganhou reconhecimento internacional e convite para acompanhar a cerim\u00f4nia do pr\u00eamio Nobel (2020) pelo seu trabalho, em que transformou casca de macad\u00e2mia em pl\u00e1stico biodegrad\u00e1vel. Os materiais pl\u00e1sticos tradicionais s\u00e3o bastante utilizados por sua leveza, plasticidade e maleabilidade, mas trazem um impacto significativo ao meio ambiente pela sua lenta decomposi\u00e7\u00e3o na natureza.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>a)<\/strong> Os materiais podem sofrer deforma\u00e7\u00f5es em resposta a v\u00e1rios agentes, como, por exemplo, os mec\u00e2nicos e os t\u00e9rmicos. Considere uma barra pl\u00e1stica de comprimento L<sub>o<\/sub> = 50 cm no momento em que sua temperatura \u00e9 igual a T<sub>o<\/sub> = 50 cm. Calcule o novo comprimento da barra quando ela for aquecida a uma temperatura&nbsp; O coeficiente de dilata\u00e7\u00e3o t\u00e9rmica da barra \u00e9 7.10<sup>-5<\/sup>C<sup>-1<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;<strong>b)<\/strong> No regime de deforma\u00e7\u00f5es el\u00e1sticas, os materiais se deformam de forma an\u00e1loga a uma mola, recuperando sua forma original quando o agente externo \u00e9 removido. Considere uma barra de material pl\u00e1stico que \u00e9 esticada elasticamente, sofrendo uma deforma\u00e7\u00e3o 0,2 cm em rela\u00e7\u00e3o ao seu comprimento de equil\u00edbrio. Calcule a energia potencial el\u00e1stica acumulada na barra, considerando-a como uma mola de constante el\u00e1stica k = 8000 N\/m que sofra a mesma deforma\u00e7\u00e3o a partir da sua posi\u00e7\u00e3o relaxada.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resposta:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>a) <\/strong>Teremos:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/Ro0PK3Rj6glLDOJMofbYa46lctdo7L1sIoasSQfLMBwZGE_zwlSb2iv2M_1exHJ8M7rB99I4FZf5Y0UHs5L9wLNFzYMxkb6ZNZIamvwSlGA84LTbone5UZshO6VLRXZi2hD5p8CM\" width=\"478\" height=\"58\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>b)<\/strong>&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" width=\"583\" height=\"66\" src=\"https:\/\/lh6.googleusercontent.com\/CR4lbep9Ifh3JFVZaEEOkqcF5kDXZ2tuqDtc3Ej-Z5-Ywr5zMYcs01xTq3JbizNJn-og5ZziVDjXrksUOtoOKaBzoSms_dH4S7oKEJeWqyoyVzFsvZdgHmpCEPRJaaN7YrM4dM76\"><\/h2>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. (Mackenzie)&nbsp;O gr\u00e1fico mostra a varia\u00e7\u00e3o da \u00e1rea lateral de um cilindro met\u00e1lico em fun\u00e7\u00e3o da temperatura, quando submetido a uma fonte de calor constante. O coeficiente de dilata\u00e7\u00e3o volum\u00e9trica m\u00e9dia do material que constitui o cilindro \u00e9:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>a)<\/strong> 60.10<sup>-6 <\/sup>\u00baC<sup>-1<\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>b)<\/strong> 120.10<sup>-6 <\/sup>\u00baC<sup>-1<\/sup>&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>c) <\/strong>180.10<sup>-6 <\/sup>\u00baC<sup>-1<\/sup>&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>d) <\/strong>240.10<sup>-6 <\/sup>\u00baC<sup>-1<\/sup>&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>e) <\/strong>300.10<sup>-6 <\/sup>\u00baC<sup>-1<\/sup>&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resposta:<\/strong> C<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;A dilata\u00e7\u00e3o superficial \u00e9 dada por:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/sPnKK5Nr0XLd7ldZ63y8m84vvoSDDM5ClqvTP1_X4qky5-e3o4H37tNdd6vcitMK08P3GQAaGX520CQeskbPAHUm0HwpKmnjjP7P_3i-iDTbLcD_f3IpE7LcMX1XnSIMoUpJDmk4\" width=\"233\" height=\"42\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sendo o coeficiente de dilata\u00e7\u00e3o superficial relacionado ao coeficiente de dilata\u00e7\u00e3o linear<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/eUu-97ZwmlIcxSxfb2QuX1iFjMyaCrHHuwn7PJFGU1ySAS9VUOhpOBxaH5rWhO2oBVW1-iv3b2FGtQvPANggT2WPswWSgeei9mEienbgVeSgzln733guFvJLjg2xcAJ7uHFI0pet\" width=\"144\" height=\"33\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">E para responder a pergunta necessitamos do coeficiente de dilata\u00e7\u00e3o volum\u00e9trica&nbsp; que tamb\u00e9m se relaciona com o coeficiente de dilata\u00e7\u00e3o linear na seguinte forma:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/RsPlyFEV_nzr8sORMlmr5zl1TwRYsWIEtjE3Ivf0SFU847TuQuRCfoW4bwPhOEGvxaiymWpVrd99i_QsViRGM2A9bTOS8Wwmkzusmx4-QMRnxB2wKF1mHOLhdGrP7EG5-s9RCp3u\" width=\"144\" height=\"34\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Substituindo a equa\u00e7\u00e3o (2) na equa\u00e7\u00e3o (1) e explicitando&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/AZwrWQ6AhDXYo8o7wWBq-aet-NL8ReosuHlnZkVN2RTcO9s14iI4JtdaogXPob9sEZpZ78GUyUOWPGitLILjCuh8LbNpQTzQl2lW37FzBRo8xXe2iAezIgOeWXjxSrOZ5_vwEiVA\" width=\"460\" height=\"72\"><\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/U93vnrMF7RU52L9EyshsiQ0uWLc0ZRvJGgJ_S3eH-b9ZYnjIDEUJ-5WTIiuQn_pjk49gg0si9fI4L6L39U1S4Bd-BiBLg_1SQpuVejRmqtr2HaAOHouZL3w-W6hywG5J-J6Vge6o\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">E, finalmente, usando a equa\u00e7\u00e3o (3):<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><img loading=\"lazy\" decoding=\"async\" width=\"602\" height=\"41\" src=\"https:\/\/lh6.googleusercontent.com\/63XLW0AHDPSSn11TtAfKyJt6CQpagrBP3UUO7dlxXCuDO5L_ArpLhSeOacREZNvR64SvDQ4KfCiAIEgEtGVBoPjLQ7UYs9z8VErPFKPOXU8PGIagKdiB_NVTZWe-epIh_9V0HPI5\"><\/h2>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. (Uern)&nbsp; A tabela a seguir apresenta os coeficientes de dilata\u00e7\u00e3o linear de alguns metais:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Metais<\/td><td>Coeficiente de dilata\u00e7\u00e3o linear, \u00baC<sup>-1<\/sup><\/td><\/tr><tr><td>ferro<\/td><td>12.10<sup>-6<\/sup><\/td><\/tr><tr><td>cobre<\/td><td>17.10<sup>-6<\/sup><\/td><\/tr><tr><td>alum\u00ednio<\/td><td>22.10<sup>-6<\/sup><\/td><\/tr><tr><td>zinco<\/td><td>26.10<sup>-6<\/sup><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Uma placa de metal de \u00e1rea 1 m<sup>2<\/sup> a 20<sup>\u00ba<\/sup>C \u00e9 aquecida at\u00e9 atingir 100<sup> \u00ba<\/sup>C&nbsp; apresentando uma varia\u00e7\u00e3o de 35.2 cm<sup>2<\/sup> em sua \u00e1rea. O metal que constitui essa placa \u00e9 o<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>a)<\/strong> ferro.&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>b)<\/strong> cobre.&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>c)<\/strong> zinco.&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>d)<\/strong> alum\u00ednio.&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Resposta:<\/strong> D<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sabendo que a dilata\u00e7\u00e3o superficial de uma placa \u00e9 dada por<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/UnyTsn_qfElVdtANzxZDFPKIFFpIbj_tBiATfHvfcD9wB1ueL5HDthfuCA4CXeYqpevlZ7PexQYHjIDhF5eAnGEbexTCQbpmVXrDM48UkGXzuwG824OY6KJsaO62bn0aHnKCYrYX\" width=\"135\" height=\"31\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Na qual&nbsp; \u00e9 o coeficiente de dilata\u00e7\u00e3o superficial que \u00e9 igual a 2 vezes o coeficiente de dilata\u00e7\u00e3o linear&nbsp; Assim,<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;<img loading=\"lazy\" decoding=\"async\" width=\"225\" height=\"157\" src=\"https:\/\/lh4.googleusercontent.com\/VCxPxyh5hSi2qLDZwlnh0zucAhjY2dAspcdwBn8IYmZtSCMxdjTX3k1PkMS804Ir7NM15ZZJqv-3H0FBEN7HEBKTWuOPMqkLHR_uuCFzekXe3r-HgZBSW0xjfacw2JF2U5KiUL6X\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Desta forma, analisando a tabela fornecida, fica claro que a placa \u00e9 feita de alum\u00ednio.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Para aprender mais, assista minha live:<\/h3>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Revis\u00e3o \u25ba Dilata\u00e7\u00e3o t\u00e9rmica de s\u00f3lidos\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/tslazk2MEFQ?start=348&amp;feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">E SE VOC\u00ca TIVER D\u00daVIDAS SOBRE ESSE CONTE\u00daDO, VOU TE FAZER UM CONVITE:&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Que tal fazer parte do&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/professorpinguim.com.br\/extensivo-enem-vestibulares-sp\/\" target=\"_blank\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">meu extensivo 2022 com 20% OFF?<\/span><\/a>&nbsp;<\/strong><br>L\u00e1, o pessoal j\u00e1 est\u00e1 estudando sobre&nbsp;<strong>Dilata\u00e7\u00e3o T\u00e9rmica<\/strong>, mas com muitas vantagens, como:<br>\ud83d\udd39 Estudo dirigido da teoria com slides e material de apoio pra voc\u00ea baixar e at\u00e9 imprimir se quiser;<br>\ud83d\udd39 Lista de Exerc\u00edcios separados por dificuldade: B\u00e1sico, Intermedi\u00e1rio e Avan\u00e7ado;<br>\ud83d\udd39 Monitoria individual pra voc\u00ea tirar suas d\u00favidas sobre o assunto, caso tenha d\u00favidas no exerc\u00edcios por exemplo;<br>\ud83d\udd39 Telegram de estudos exclusivo comigo e com outros alunos como voc\u00ea;<br>\ud83d\udd39 Encontros ao vivo em grupo pra batermos um papo sobre f\u00edsica.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/professorpinguim.com.br\/extensivo-enem-vestibulares-sp\/\"><img loading=\"lazy\" decoding=\"async\" width=\"970\" height=\"250\" src=\"https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/01\/extensivo-2022-professor-pinguim-cupom-de-desconto.png\" alt=\"Cupom de desconto - F\u00edsica Professor Pinguim \" class=\"wp-image-6582\" srcset=\"https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/01\/extensivo-2022-professor-pinguim-cupom-de-desconto.png 970w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/01\/extensivo-2022-professor-pinguim-cupom-de-desconto-300x77.png 300w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/01\/extensivo-2022-professor-pinguim-cupom-de-desconto-768x198.png 768w, https:\/\/professorpinguim.com.br\/blog\/wp-content\/uploads\/2022\/01\/extensivo-2022-professor-pinguim-cupom-de-desconto-670x173.png 670w\" sizes=\"(max-width: 970px) 100vw, 970px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Demais n\u00e3o \u00e9?&nbsp;<span class=\"has-inline-color has-vivid-cyan-blue-color\"><a href=\"https:\/\/professorpinguim.com.br\/extensivo-enem-vestibulares-sp\/\"><strong>Aperte aqui<\/strong><\/a>&nbsp;<\/span>e use o cupom&nbsp;<strong>BLOG20<\/strong>&nbsp;para se inscrever com&nbsp;<strong>20% OFF<\/strong>&nbsp;e iniciar ainda hoje seus estudos na melhor plataforma de f\u00edsica do pa\u00eds.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SAIBA MAIS<\/strong><br>\ud83d\udc49&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/professorpinguim.com.br\/blog\/dilatacao-termica-e-calorimetria\/\" target=\"_blank\"><strong>Dilata\u00e7\u00e3o t\u00e9rmica e Calorimetria<\/strong><\/a><br>\ud83d\udc49&nbsp;<strong><a rel=\"noreferrer noopener\" href=\"https:\/\/professorpinguim.com.br\/blog\/lista-de-exercicios-sobre-transmissao-de-calor\/\" target=\"_blank\">Lista de exerc\u00edcios sobre Transmiss\u00e3o de calor<\/a><\/strong><br>\ud83d\udc49 <a rel=\"noreferrer noopener\" href=\"https:\/\/professorpinguim.com.br\/blog\/exercicios-de-termologia\/\" target=\"_blank\"><strong>Exerc\u00edcios de Termologia<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Me acompanhe nas redes sociais: curta a minha&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/www.facebook.com\/professorpinguim\/\" target=\"_blank\"><strong>p\u00e1gina no Facebook<\/strong><\/a><strong>,<\/strong>&nbsp;me&nbsp;siga no&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/www.instagram.com\/professorpinguim\/\" target=\"_blank\"><strong>Instagram<\/strong><\/a><strong>,<\/strong>&nbsp;se inscreva no&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/www.youtube.com\/c\/PinguimV%C3%ADdeoF%C3%ADsica\/?sub_confirmation=1\" target=\"_blank\"><strong>Youtube<\/strong><\/a>&nbsp;e participe do meu canal oficial no&nbsp;<strong><a href=\"https:\/\/professorpinguim.com.br\/telegram\">Telegram<\/a><\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hoje vamos fazer alguns exerc\u00edcios sobre Dilata\u00e7\u00e3o T\u00e9rmica S\u00f3lidos, mas antes vamos revisar alguns assuntos importantes. Acompanhe!<\/p>\n","protected":false},"author":1,"featured_media":7310,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[744,764,228,656],"tags":[765,766,368,372,767],"class_list":["post-7300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exercicios-resolvidos","category-ondas","category-optica","category-termologia","tag-dilatacao-linear","tag-dilatacao-superficial","tag-dilatacao-termica","tag-dilatacao-termica-dos-solidos","tag-dilatacao-volumetrica"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.12 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Resumo sobre Dilata\u00e7\u00e3o T\u00e9rmica de s\u00f3lidos com Exerc\u00edcios - Professor Pinguim | F\u00edsica<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/professorpinguim.com.br\/blog\/resumo-sobre-dilatacao-termica-de-solidos-com-exercicios\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Resumo sobre Dilata\u00e7\u00e3o T\u00e9rmica de s\u00f3lidos com Exerc\u00edcios - Professor Pinguim | F\u00edsica\" \/>\n<meta property=\"og:description\" content=\"Hoje vamos fazer alguns exerc\u00edcios sobre Dilata\u00e7\u00e3o T\u00e9rmica S\u00f3lidos, mas antes vamos revisar alguns assuntos importantes. 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