{"id":56165,"date":"2021-10-07T09:00:00","date_gmt":"2021-10-07T12:00:00","guid":{"rendered":"https:\/\/blog.estrategiavestibulares.com.br\/?p=56165"},"modified":"2024-09-26T14:29:40","modified_gmt":"2024-09-26T17:29:40","slug":"ordem-de-grandeza","status":"publish","type":"post","link":"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/ordem-de-grandeza\/","title":{"rendered":"Ordem de grandeza: conhe\u00e7a os conceitos e a nota\u00e7\u00e3o cient\u00edfica"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Na <span id=\"urn:enhancement-324fad00-f2f5-41e7-9e09-b0f98924510c\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/fisica\">f&iacute;sica<\/span> moderna e astron&ocirc;mica, &eacute; comum que sejam utilizados n&uacute;meros muito grandes, que ultrapassam a casa dos bilh&otilde;es, por exemplo. Para facilitar a escrita e compreens&atilde;o desses valores, os estudiosos criaram a <span id=\"urn:enhancement-36622591-4b4b-42ad-8a81-cac15599763f\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/notacao-cientifica\">nota&ccedil;&atilde;o cient&iacute;fica<\/span> e a <span id=\"urn:enhancement-f25e0f89-b3ac-485c-b30a-d65f2f899c1b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span>.<p class=\"wp-block-paragraph\">Para te apresentar esses conceitos e te ajudar no estudo pr&eacute;-prova, o Estrat&eacute;gia Vestibulares desenvolveu um resumo do tema <span id=\"urn:enhancement-c8c7bdcb-60b8-462a-be2c-a8041a86f463\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span>, com as informa&ccedil;&otilde;es mais importantes do assunto: regras, prefixos, escalas e usos. Ao final, veja como isso aparece nas quest&otilde;es e como voc&ecirc; pode resolv&ecirc;-las. Confira!<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Navegue pelo conte\u00fado<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/ordem-de-grandeza\/#O-que-e-ordem-de-grandeza\" >O que &eacute; ordem de grandeza?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/ordem-de-grandeza\/#Notacao-cientifica\" >Nota&ccedil;&atilde;o cient&iacute;fica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/ordem-de-grandeza\/#Regras-para-Ordem-de-Grandeza\" >Regras para Ordem de Grandeza<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/ordem-de-grandeza\/#Prefixos-para-ordens-de-grandeza\" >Prefixos para ordens de grandeza<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/ordem-de-grandeza\/#Escala-de-comprimento\" >Escala de comprimento<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/ordem-de-grandeza\/#Questao-sobre-Ordem-de-Grandeza\" >Quest&atilde;o sobre Ordem de Grandeza<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/ordem-de-grandeza\/#Assista-uma-aula-gratis-de-Ordem-de-Grandeza\" >Assista uma aula gr&aacute;tis de Ordem de Grandeza<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/ordem-de-grandeza\/#Veja-tambem\" >Veja tamb&eacute;m:<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-o-que-e-ordem-de-grandeza\"><span class=\"ez-toc-section\" id=\"O-que-e-ordem-de-grandeza\"><\/span>O que &eacute; ordem de grandeza?<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Conhecer a defini&ccedil;&atilde;o das&nbsp; <span id=\"urn:enhancement-8f9ce92c-7691-47b4-bb9f-22e7ebacfea7\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/expressoes-algebricas\">express&otilde;es<\/span> &eacute; um bom ponto de partida para a compreens&atilde;o das disciplinas que aparecem no <span id=\"urn:enhancement-8084d0fc-1e95-4e68-a783-ad6b843ce67f\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/vestibular\">vestibular<\/span>. Veja, a seguir, o que &eacute; <span id=\"urn:enhancement-1a4e35c6-216e-4722-8993-43725f3cd62f\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span> e qual sua import&acirc;ncia:<\/p><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-f863e7c8-75bd-4fe6-99be-66333ce78e44\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span> &eacute; um modo de<strong> representar um valor<\/strong> por meio de um n&uacute;mero <strong>arredondado ou simplificado, <\/strong>geralmente com <span id=\"urn:enhancement-d29fdcff-506e-49f3-bb2f-9aa9fabf983b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">pot&ecirc;ncias<\/span> na base 10. Ela &eacute; muito utilizada quando os c&aacute;lculos resultam em <strong>valores extremos<\/strong>: muito grandes ou muito pequenos.<\/p><p class=\"wp-block-paragraph\">Por exemplo, imagine que a <strong>dist&acirc;ncia entre dois astros <\/strong>da via l&aacute;ctea seja de 1.150.658 km e que esse valor apare&ccedil;a em um <span id=\"urn:enhancement-f3743437-315a-4dee-a9de-0311099cbc7c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/vestibular\">vestibular<\/span>. Para simplifica&ccedil;&atilde;o, pode-se optar por expressar o resultado em uma pot&ecirc;ncia de 10, de forma que o n&uacute;mero esteja <strong>arredondado<\/strong> e expresse a <strong>magnitude <\/strong>dessa dist&acirc;ncia. Nesse caso, o valor est&aacute; expresso na <strong>ordem dos milh&otilde;es de quil&ocirc;metros.<\/strong><\/p><p class=\"wp-block-paragraph\">De maneira an&aacute;loga,&eacute; poss&iacute;vel citar o exemplo do<strong> di&acirc;metro de uma c&eacute;lula humana<\/strong>. Por ser muito pequeno, esse valor apresenta diversas casas decimais: 0.000002. Na resolu&ccedil;&atilde;o ou alternativas, esse n&uacute;mero pode ser representado pelas ordens de grandeza e por <span id=\"urn:enhancement-a78d8df8-7311-42d7-bf33-44cdf91db7f6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">pot&ecirc;ncias<\/span> de 10, o que facilita a escrita e desenvolvimento dos c&aacute;lculos.&nbsp;<\/p><p class=\"wp-block-paragraph\">Perceba que o uso dessas ferramentas, al&eacute;m de simplificar os escritos matem&aacute;ticos, tamb&eacute;m expressam <strong>a significa&ccedil;&atilde;o de um valor num&eacute;rico<\/strong>. Ou seja, independentemente dos algarismos que aparecem nas unidades e dezenas, sabe-se que a dist&acirc;ncia entre dois astros &eacute; muito grande. Assim como o di&acirc;metro de uma c&eacute;lula &eacute; t&atilde;o pequeno que precisa ser representado com <span id=\"urn:enhancement-a8d36184-6f7f-41c2-ab8e-1b0c0590855b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">pot&ecirc;ncias<\/span> de <span id=\"urn:enhancement-90c1f460-6c79-4b4d-9b20-70584c109d4c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/coeficientes\">coeficiente<\/span> negativo.<\/p><h2 class=\"wp-block-heading\" id=\"h-notacao-cientifica\"><span class=\"ez-toc-section\" id=\"Notacao-cientifica\"><\/span>Nota&ccedil;&atilde;o cient&iacute;fica<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Para dar continuidade ao estudo das ordens de grandeza, &eacute; importante conhecer o conceito de <span id=\"urn:enhancement-b6ea893a-e573-41e2-9ef9-7eae99b67753\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/notacao-cientifica\">nota&ccedil;&atilde;o cient&iacute;fica<\/span>. Essa ferramenta matem&aacute;tica &eacute; utilizada para converter valores num&eacute;ricos em <span id=\"urn:enhancement-95189760-e45c-4cc4-a128-4a9e2996de44\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">pot&ecirc;ncias<\/span> de 10 e deix&aacute;-los com a seguinte apar&ecirc;ncia: <strong>x.10<\/strong><strong><sup>y<\/sup><\/strong><strong>.<\/strong><\/p><p class=\"wp-block-paragraph\">Com o objetivo de conseguir tal transforma&ccedil;&atilde;o e alcan&ccedil;ar esse padr&atilde;o, &eacute; necess&aacute;rio que <strong>1&le;x&lt;10<\/strong> e <strong>y&#8714;Z<\/strong> (pertencente ao conjunto dos n&uacute;meros inteiros).&nbsp;<\/p><p class=\"wp-block-paragraph\">Veja exemplos:<\/p><p class=\"has-text-align-center wp-block-paragraph\"><strong>I) 1370000000 = 1,37 . 10<\/strong><strong><sup>9<\/sup><\/strong><strong>&nbsp;&nbsp;&nbsp;&nbsp;<\/strong><\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/GYps_PEgXIdyQmhJIBlF8sbm1NetKtI28sOkTTD9Ka_1JX6OcKVczqloAoV2Qws39UoJxi8FN0g8tuHRQEMLISKkFK_-b7wErnblWWq0nI6GU6_9hlXQ32umcFwx7aXbmHL_iHMx=s0\" alt=\"ordem de grandeza - nota&ccedil;&atilde;o cient&iacute;fica\"><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Perceba que, como <strong>1&le;x&lt;10<\/strong>, a nota&ccedil;&atilde;o n&atilde;o admitir&aacute; 13,7 ou 0,137 e o &uacute;nico valor poss&iacute;vel &eacute; 1,37.<br>Para conseguir o 10<sup>9<\/sup> &eacute; preciso contar o n&uacute;mero de casas entre a v&iacute;rgula e o &uacute;ltimo zero, como na figura acima.<\/p><p class=\"has-text-align-center wp-block-paragraph\"><strong>II) 0,00000000057= 5,7 . 10<\/strong><strong><sup>-10<\/sup><\/strong><\/p><p class=\"wp-block-paragraph\">&nbsp;Nesse caso, o valor mais adequado para atender&nbsp; <strong>1&le;x&lt;10 <\/strong>&eacute; 5,7. Na determina&ccedil;&atilde;o do <span id=\"urn:enhancement-96669ef7-ec87-4249-93d8-be387c8df6f6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">expoente<\/span>, utiliza-se o mesmo m&eacute;todo do exemplo anterior, veja:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"278\" height=\"130\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/10\/image-3.jpg\" alt=\"ordem de grandeza - nota&ccedil;&atilde;o\" class=\"wp-image-56166\"><\/figure>\n<\/div><h2 class=\"wp-block-heading\" id=\"h-regras-para-ordem-de-grandeza\"><span class=\"ez-toc-section\" id=\"Regras-para-Ordem-de-Grandeza\"><\/span>Regras para Ordem de Grandeza<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Al&eacute;m de conhecer a <span id=\"urn:enhancement-a5751825-8e29-4fa4-9f80-204ae06ecfea\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/notacao-cientifica\">nota&ccedil;&atilde;o cient&iacute;fica<\/span>, aprenda agora quais s&atilde;o e como s&atilde;o aplicadas as regras para <span id=\"urn:enhancement-917b48bd-daac-42b5-b01d-a8f8ba26688b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span>:<\/p><p class=\"wp-block-paragraph\">Como essa ferramenta matem&aacute;tica se relaciona com uma <strong>aproxima&ccedil;&atilde;o dos valores a partir da pot&ecirc;ncia de dez, <\/strong>utiliza-se as seguintes etapas:<\/p><ul class=\"wp-block-list\">\n<li>Utiliza-se a <span id=\"urn:enhancement-a91e238a-0256-460e-9825-362506fc05ad\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/notacao-cientifica\">nota&ccedil;&atilde;o cient&iacute;fica<\/span>: <strong>x.10<\/strong><strong><sup>y<\/sup><\/strong>;<\/li>\n\n\n\n<li>Procura-se entre quais pot&ecirc;ncias de dez o valor est&aacute; contido;<\/li>\n\n\n\n<li>Estima-se qual pot&ecirc;ncia est&aacute; mais pr&oacute;xima desse n&uacute;mero, a partir do seguinte par&acirc;metro: quando <strong>x&gt;5,5 a <span id=\"urn:enhancement-b69d5663-d12f-4773-a5b6-461282af002b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span> &eacute; a pot&ecirc;ncia de maior expoente<\/strong>, quando <strong>x&lt;5,5 a ordem ser&aacute; a menor pot&ecirc;ncia<\/strong>.<\/li>\n<\/ul><p class=\"wp-block-paragraph\">Veja aplica&ccedil;&otilde;es:&nbsp;<\/p><p class=\"has-text-align-center wp-block-paragraph\"><strong>I) 1370000000 = 1,37 . 10<\/strong><strong><sup>9<\/sup><\/strong><strong>&nbsp;&nbsp;&nbsp;&nbsp;<\/strong><\/p><p class=\"wp-block-paragraph\">O n&uacute;mero est&aacute; entre 10<sup>9<\/sup> e 10<sup>10<\/sup>, como 1,37&lt;5,5, a <span id=\"urn:enhancement-46c774e7-fa1c-44cb-992c-ffa9a6cde8da\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span> ser&aacute; a de menor pot&ecirc;ncia. Ou seja, <strong>1370000000 &eacute; da <span id=\"urn:enhancement-831b2bd0-fb69-4ac3-a874-919b24e7deb4\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span> de 10<\/strong><strong><sup>9<\/sup><\/strong>.&nbsp;<\/p><p class=\"has-text-align-center wp-block-paragraph\"><strong>II) 0,00000000057= 5,7 . 10<\/strong><strong><sup>-10<\/sup><\/strong><\/p><p class=\"wp-block-paragraph\">O valor est&aacute; entre 10<sup>-10 <\/sup>&nbsp;e 10<sup>-11<\/sup> e, se considerarmos que 5,7&gt;5,5, deve-se manter a pot&ecirc;ncia de maior <span id=\"urn:enhancement-4a05fc08-d51f-46c1-b3d9-fe47d03cb612\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">expoente<\/span>. Nesse caso, como os <span id=\"urn:enhancement-fe443671-6364-4bf7-ac2e-90be9ca5179f\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">expoentes<\/span> s&atilde;o negativos, o menor n&uacute;mero &eacute; aquele que mais se aproxima do 0. Ou seja, <strong>&nbsp;0,00000000057 &eacute; da ordem de 10<\/strong><strong><sup>-10<\/sup><\/strong>.<\/p><h2 class=\"wp-block-heading\" id=\"h-prefixos-para-ordens-de-grandeza\"><span class=\"ez-toc-section\" id=\"Prefixos-para-ordens-de-grandeza\"><\/span>Prefixos para ordens de grandeza<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Para al&eacute;m de <span id=\"urn:enhancement-037625e7-bb75-4882-a168-6693e90e1fb6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">pot&ecirc;ncias<\/span>, a magnitude dos valores pode ser descrita por meio de prefixos padronizados, que facilitam as representa&ccedil;&otilde;es matem&aacute;ticas e aparecem no <span id=\"urn:enhancement-d1bf132c-b9cb-4787-a7e4-a70ae9f2e08f\" class=\"textannotation disambiguated wl-event\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/enem-64632\">Enem<\/span> com <span id=\"urn:enhancement-54544aa1-3057-4396-8328-2e683d146bfd\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/frequencia\">frequ&ecirc;ncia<\/span>. Confira os principais prefixos para ordens de grandeza na tabela seguinte:<\/p><figure class=\"wp-block-table aligncenter\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Prefixo e s&iacute;mbolo<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Pot&ecirc;ncia (<span id=\"urn:enhancement-34ae5af4-fe6b-4283-804e-3a00f61f7765\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span>)<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">pico (p)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-12<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">nano (n)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-9<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">micro (&micro;)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-6<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">mili (m)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-3<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">centi (c)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-2<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">deci (d)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-1<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">deca (da)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>1<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">hecto (h)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>2<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">quilo (k)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>3<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">mega (M)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>6<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">giga (G)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>9<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">tera (T)<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>12<\/sup><\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\" id=\"h-escala-de-comprimento\"><span class=\"ez-toc-section\" id=\"Escala-de-comprimento\"><\/span>Escala de comprimento<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Por meio dos <strong>prefixos <\/strong>e <span id=\"urn:enhancement-2f3b537a-d7b6-493f-a2bd-2968fcecec4d\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">pot&ecirc;ncias<\/span>, &eacute; poss&iacute;vel estabelecer uma <strong>escala das ordens de grandeza do comprimento<\/strong>, como demonstrado na tabela a seguir:<\/p><figure class=\"wp-block-table aligncenter\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Quil&ocirc;metro<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Hect&ocirc;metro<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Dec&acirc;metro<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Metro<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Dec&iacute;metro<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Cent&iacute;metro<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Mil&iacute;metro<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">km<\/td><td class=\"has-text-align-center\" data-align=\"center\">hm<\/td><td class=\"has-text-align-center\" data-align=\"center\">dam<\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>m<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">dm<\/td><td class=\"has-text-align-center\" data-align=\"center\">cm<\/td><td class=\"has-text-align-center\" data-align=\"center\">mm<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">10<sup>3 <\/sup>m<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>2 <\/sup>m<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>1 <\/sup>m<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>0 <\/sup>m<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-1 <\/sup>m<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-2 <\/sup>m<\/td><td class=\"has-text-align-center\" data-align=\"center\">10<sup>-3 <\/sup>m<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\" id=\"h-questao-sobre-ordem-de-grandeza\"><span class=\"ez-toc-section\" id=\"Questao-sobre-Ordem-de-Grandeza\"><\/span>Quest&atilde;o sobre Ordem de Grandeza<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Para entender como aparecem as quest&otilde;es de <span id=\"urn:enhancement-34d83480-f849-43cd-815a-07b4db04140b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span> e <span id=\"urn:enhancement-93dd1455-e55f-4f51-8e13-b33c34f94c46\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/notacao-cientifica\">nota&ccedil;&atilde;o cient&iacute;fica<\/span> nos vestibulares, veja a resolu&ccedil;&atilde;o proposta por nossa equipe.<\/p><p class=\"wp-block-paragraph\"><strong>CEFET-MG 2008<\/strong><\/p><p class=\"wp-block-paragraph\">Nos trabalhos cient&iacute;ficos, n&uacute;meros muito grandes ou pr&oacute;ximos de zero, s&atilde;o escritos em <span id=\"urn:enhancement-228923fe-a4ca-49cb-874a-06136fe62313\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/notacao-cientifica\">nota&ccedil;&atilde;o cient&iacute;fica<\/span>, que consiste em um n&uacute;mero x, tal que 1 &lt; x &lt; 10 multiplicado por uma pot&ecirc;ncia de base 10. Assim sendo, 0,00000045 deve ser escrito da seguinte forma:<\/p><p class=\"wp-block-paragraph\">a) 0,45 . 10<sup>-7<\/sup><br>b) 4,5 . 10<sup>-7<\/sup><br>c) 45 . 10<sup>-6<\/sup><br>d) 4,5 . 10<sup>8<\/sup><\/p><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-f01a2e9a-7b92-476d-843b-a7122e9c1c54\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/notacao-cientifica\">nota&ccedil;&atilde;o cient&iacute;fica<\/span> admite o formato de <strong>x.10<\/strong><strong><sup>y<\/sup><\/strong><sup> <\/sup>com , <strong>1&le;x&lt;10<\/strong> e <strong>y&#8714;Z. <\/strong>Para atender a esses crit&eacute;rios, o &uacute;nico x poss&iacute;vel &eacute; <strong>x=4,5. <\/strong>Para adicionar a pot&ecirc;ncia e o valor de y, contam-se as casas decimais, como na figura:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/lQLE4NYFQOPzE5oCltphBnkHLX-4EdLb21zjl24eev4_YXOCQItzknFKdpsd6od0wfQc_M5SMq49BPBlRtWmOdYu5yuGoC8VPXB1ObJ21VQsVtEvk5DySftsOU0hv7Rx43SOib81=s0\" alt=\"Quest&atilde;o sobre Ordem de Grandeza\"><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Com isso, a nota&ccedil;&atilde;o correta para esse n&uacute;mero ser&aacute;: 4,5.10<sup>-7<\/sup>, como na <strong>alternativa B.<\/strong>&nbsp;<\/p><h2 class=\"wp-block-heading\" id=\"h-assista-uma-aula-gratis-de-ordem-de-grandeza\"><span class=\"ez-toc-section\" id=\"Assista-uma-aula-gratis-de-Ordem-de-Grandeza\"><\/span>Assista uma aula gr&aacute;tis de Ordem de Grandeza<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Na aula de matem&aacute;tica do Estrat&eacute;gia Vestibulares, com o professor Andrew Cazemiro, voc&ecirc; pode acompanhar os principais conceitos, usos e aplica&ccedil;&otilde;es da <span id=\"urn:enhancement-6a595b0d-655e-4467-b662-f454ad1df439\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/notacao-cientifica\">nota&ccedil;&atilde;o cient&iacute;fica<\/span> e <span id=\"urn:enhancement-f9e6a897-6fb8-477e-8214-43152e023b72\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ordem-de-grandeza\">ordem de grandeza<\/span>:&nbsp;<\/p><figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"cs-embed cs-embed-responsive\"><iframe title=\"Nota&ccedil;&atilde;o Cient&iacute;fica | Aprendendo Matem&aacute;tica do Zero\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/kPe6foFaSSw?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><\/div>\n<\/div><\/figure><p class=\"wp-block-paragraph\">Precisa aprender mais sobre as exatas e como elas podem aparecer no <span id=\"urn:enhancement-1857c84e-8227-4534-a4fc-217308ea4e24\" class=\"textannotation disambiguated wl-event\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/enem-64632\">Enem<\/span>? Conhe&ccedil;a os cursos do Estrat&eacute;gia voltados para a <a href=\"https:\/\/www.estrategiavestibulares.com.br\/vestibulares\/enem\/curso-de-matematica-para-enem-2021-prof-andrew-cazemiro\/\" target=\"_blank\" rel=\"noopener noreferrer\">matem&aacute;tica<\/a>, a <a href=\"https:\/\/www.estrategiavestibulares.com.br\/vestibulares\/enem\/curso-de-fisica-para-enem-2021-prof-henrique-goulart\/\" target=\"_blank\" rel=\"noopener noreferrer\">f&iacute;sica <\/a>e a <a href=\"https:\/\/www.estrategiavestibulares.com.br\/vestibulares\/enem\/curso-de-quimica-para-enem-2021-prof-guilherme-alves\/\" target=\"_blank\" rel=\"noopener noreferrer\">qu&iacute;mica<\/a>. Al&eacute;m disso, veja mais sobre o nosso banco de quest&otilde;es, criado para te impulsionar no estudo pr&eacute;-<span id=\"urn:enhancement-36cd7fcf-a710-4b67-9f65-845cdbc94209\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/vestibular\">vestibular<\/span>, clique no banner abaixo:&nbsp;<\/p><p class=\"wp-block-paragraph\"><a id=\"cta\" class=\"cta-imagem\" href=\"https:\/\/vestibulares.estrategia.com\/curso\/pacote-enem\/\" target=\"blank\">\n                <img decoding=\"async\" width=\"100%\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/12\/Enem.jpg\" alt=\"CTA curso Enem\" title=\"CTA curso Enem\">\n        <\/a>\n\n\n\n<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Veja-tambem\"><\/span>Veja tamb&eacute;m:<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/fisica\/fisica-enem\/\">O que mais cai em F&iacute;sica no Enem?<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/fisica\/diagrama-de-fases\/\">Diagrama de Fases: o que &eacute; e como interpretar<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/fisica\/formulas-fisica-enem\/\">F&oacute;rmulas de F&iacute;sica mais comuns do Enem e outros vestibulares<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/fisica\/calorimetria-no-enem\/\">Calorimetria no Enem: como cai?<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/fisica\/hidrostatica\/\">Hidrost&aacute;tica: press&atilde;o, densidade e f&oacute;rmulas<\/a>&nbsp;&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/fisica\/optica\/\">Como cai a &oacute;ptica no Enem<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/fisica\/eletricidade\/\">Eletricidade: conhe&ccedil;a as principais f&oacute;rmulas e conceitos<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/fisica\/prova-fisica-2-fase-unicamp-2020\/\">Resolu&ccedil;&atilde;o da prova de F&iacute;sica da 2&ordf; Fase da Unicamp 2020<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/fisica\/prova-fuvest-2020-fisica\/\">Resolu&ccedil;&atilde;o Comentada da prova de F&iacute;sica FUVEST 2020<\/a><\/li>\n<\/ul><\/p>\n","protected":false},"excerpt":{"rendered":"Na f&iacute;sica moderna e astron&ocirc;mica, &eacute; comum que sejam utilizados n&uacute;meros muito grandes, que ultrapassam a casa dos&hellip;\n","protected":false},"author":23,"featured_media":76181,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-56165","post","type-post","status-publish","format-standard","has-post-thumbnail","category-fisica"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.9 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Ordem de grandeza: conhe\u00e7a os conceitos e a nota\u00e7\u00e3o cient\u00edfica<\/title>\n<meta name=\"description\" content=\"Resumo sobre ordem de grandeza com as informa\u00e7\u00f5es mais importantes do assunto: regras, prefixos, escalas, usos e como aparece no vestibular.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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