{"id":699,"date":"2015-05-12T18:28:04","date_gmt":"2015-05-12T18:28:04","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=699"},"modified":"2024-09-03T12:52:10","modified_gmt":"2024-09-03T12:52:10","slug":"resolucao-comentada-da-ufsj-mg-2015","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-resolvidos-da-ufsj-mg-2015\/resolucao-comentada-da-ufsj-mg-2015\/","title":{"rendered":"Resolu\u00e7\u00e3o Comentada da UFSJ-MG 2015"},"content":{"rendered":"

RESOLU\u00c7\u00d5ES<\/span><\/span><\/span><\/p>\n

01- <\/span><\/span><\/span>Natureza das ondas:<\/span><\/span><\/span>
\n<\/span><\/span><\/span>Ondas mec\u00e2nicas<\/span><\/span><\/span>: s\u00e3o aquelas que necessitam de um meio material para se propagar.\u00a0 Exemplos: ondas no mar (o meio \u00e9 a \u00e1gua), ondas sonoras ( o meio pode ser ar, \u00e1gua,etc.), ondas em uma corda (o meio \u00e9 a corda), etc.Todas essas perturba\u00e7\u00f5es s\u00e3o causadas em meios materiais.
\n– <\/span><\/span><\/span>Ondas eletromagn\u00e9ticas<\/span><\/span><\/span>: s\u00e3o ondas que n\u00e3o precisam de um meio material para se propagar. Tamb\u00e9m podem se propagar em meios materiais. A luz \u00e9 uma onda eletromagn\u00e9tica, pois se propaga no v\u00e1cuo, no ar, na \u00e1gua, etc. Outros exemplos: microondas, raio-x , ondas de r\u00e1dio, etc.<\/span><\/span><\/span><\/p>\n

Tipos de ondas:<\/span><\/span><\/span><\/p>\n

– <\/span><\/span><\/span>Ondas transversais<\/span><\/span><\/span> \u2013 \u00a0a dire\u00e7\u00e3o de propaga\u00e7\u00e3o \u00e9 perpendicular \u00e0 dire\u00e7\u00e3o de vibra\u00e7\u00e3o. Exemplos: ondas numa corda, ondas na \u00e1gua, ondas eletromagn\u00e9ticas, etc.<\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\u00c0 medida que a onda se propaga para a direita (dire\u00e7\u00e3o horizontal), as part\u00edculas do meio do meio (mancha na corda, mol\u00e9cula<\/span><\/span><\/span><\/p>\n

da \u00e1gua) se movem na dire\u00e7\u00e3o vertical, subindo e descendo.\u00a0<\/span><\/span><\/span><\/p>\n

– <\/span><\/span><\/span>Ondas longitudinais<\/span><\/span><\/span> \u2013 a dire\u00e7\u00e3o de propaga\u00e7\u00e3o coincide com a dire\u00e7\u00e3o de oscila\u00e7\u00e3o. Exemplos: ondas sonoras, ondas numa mola, etc. (o alto falante vibra no eixo x, e as ondas seguem essa mesma dire\u00e7\u00e3o), etc.
\n<\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\"\"\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\"\"\u00a0\u00a0\u00a0<\/span><\/p>\n

As ondas se movem atrav\u00e9s de uma s\u00e9rie de compress\u00f5es e rarefa\u00e7\u00f5es em um <\/span><\/span><\/span>meio (ar, mola)<\/span><\/span><\/span> se propagando, nas figuras, na dire\u00e7\u00e3o horizontal e onde as mol\u00e9culas de ar ou cada ponto\u00a0 da mola vibram tamb\u00e9m na dire\u00e7\u00e3o horizontal. No ar se movem em todas as dire\u00e7\u00f5es e mesmo sentido.<\/span><\/span><\/span><\/p>\n

R- D\u00a0<\/span><\/span><\/span><\/p>\n

02- <\/span><\/span><\/span>Quanto <\/span><\/span><\/span>mais denso<\/span><\/span><\/span> for o meio material <\/span><\/span><\/span>maior \u00e9 a velocidade do som nele.<\/span><\/span><\/span><\/p>\n

R- C<\/span><\/span><\/span><\/p>\n

03- <\/span><\/span><\/span>C\/5 = (F \u2013 32)\/9<\/span><\/span><\/span> — C\/5 = (100,4 \u2013 32)\/9 — C\/5 = 68,4\/9 — C\/5 = 7,6 — C = 38 <\/span><\/span><\/span>o<\/span><\/span><\/sup><\/span>C.<\/span><\/span><\/span><\/p>\n

R- B<\/span><\/span><\/span><\/p>\n

04- <\/span><\/span><\/span>Trata-se de uma transforma\u00e7\u00e3o a volume constante.com as seguintes caracter\u00edsticas:<\/span><\/span><\/span><\/p>\n

Transforma\u00e7\u00e3o isoc\u00f3rica, isom\u00e9trica ou isovolum\u00e9trica<\/b><\/span><\/span><\/span><\/p>\n

\"\"\u00a0Ocorre a volume constante\u00a0 —\u00a0 V<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>=V\u00a0 —\u00a0 \u0394V=0\u00a0 —\u00a0 W=P.\u0394V\u00a0 —\u00a0 W=P.0\u00a0 —\u00a0 W=0\u00a0 — \u0394U = Q \u2013 W\u00a0 —\u00a0 \u0394U=Q \u2013 0\u00a0 —\u00a0 \u0394U=Q<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

Assim, <\/b><\/span><\/span><\/span>todo o calor (Q) recebido pelo sistema \u00e9 igual \u00e0 sua varia\u00e7\u00e3o de energia interna (\u0394U)<\/b><\/span><\/span><\/span><\/p>\n

R- A<\/b><\/span><\/span><\/span><\/p>\n

05- <\/span><\/span><\/span>\u2206L = L<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>.\u03b1.\u2206t<\/b><\/span><\/span><\/span> = 40.24.10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span>.(60 \u2013 20) = 960.10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span>.40 — \u2206L = 38400.10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span> — \u2206L = 0,0384 m.<\/b><\/span><\/span><\/span><\/p>\n

R- B<\/b><\/span><\/span><\/span><\/p>\n

\u2206L = L<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>.\u03b1.\u2206t<\/b><\/span><\/span><\/span> = 40.24.10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span>.(60 \u2013 20) = 960.10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span>.40 — \u2206L = 38400.10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span> — \u2206L = 0,0384 m.<\/b><\/span><\/span><\/span><\/p>\n

R- B<\/b><\/span><\/span><\/span><\/p>\n

06- <\/span><\/span><\/span>V=c=d\/t<\/span><\/span><\/span> — 3.10<\/span><\/span><\/span>5<\/span><\/span><\/sup><\/span> = d\/16×60 — d = 3.10<\/span><\/span><\/span>5<\/span><\/span><\/sup><\/span>.960 — d = 2880.10<\/span><\/span><\/span>5 <\/span><\/span><\/sup><\/span>= 288.10<\/span><\/span><\/span>6<\/span><\/span><\/sup><\/span> km (ida e volta do pulso) — <\/span><\/span><\/span><\/p>\n

d = 144.10<\/span><\/span><\/span>6<\/span><\/span><\/sup><\/span> km.<\/span><\/span><\/span><\/p>\n

R- C<\/span><\/span><\/span><\/span><\/p>\n

<\/h2>\n

Voltar para exerc\u00edcios.<\/span><\/a><\/h2>\n","protected":false},"excerpt":{"rendered":"

RESOLU\u00c7\u00d5ES 01- Natureza das ondas: Ondas mec\u00e2nicas: s\u00e3o aquelas que necessitam de um meio material para se propagar.\u00a0 Exemplos: ondas no mar (o meio \u00e9 a \u00e1gua), ondas sonoras ( o meio pode ser ar, \u00e1gua,etc.), ondas em uma corda (o meio \u00e9 a corda), etc.Todas essas perturba\u00e7\u00f5es s\u00e3o causadas em meios materiais. – Ondas eletromagn\u00e9ticas: s\u00e3o ondas que n\u00e3o<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":697,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-699","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/699","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/comments?post=699"}],"version-history":[{"count":1,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/699\/revisions"}],"predecessor-version":[{"id":700,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/699\/revisions\/700"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/697"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=699"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}