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A transferência de calor pode ocorrer de três formas diferentes, sendo elas: condução, convecção e radiação. Qual é a forma de transferência de calor que ocorre por meio de ondas eletromagnéticas?

","status","pending_classification","hasRelatedVideo","relatedVideos",[84],{"_85":86,"_104":105,"_29":120,"_139":140,"_158":159},"content",{"_21":87,"_33":88,"_89":-5,"_90":91,"_92":93,"_94":-5,"_23":95,"_98":99,"_100":99,"_101":-5,"_102":103},"162087be-594f-460e-bbdd-a339ac2f10ad","Calor Latente - Parte 1","description","content_type_id","1051eee7-c62e-4b2c-9900-77a29fcec080","resource_id","f2b62fc2-7079-40e7-a5b5-c4a9769b205d","user_id",{"_96":97},"external_id","3659","created_at","2025-08-20T12:27:41.608438+00:00","updated_at","content_group_id","slug","calor-latente-parte-1","prometheusData",{"_106":107,"_113":114,"_115":116,"_117":118,"_6":119},"provider",{"_21":108,"_109":110,"_111":112},"06f120be-2194-4548-8336-7ba44ffbae14","key","grupo_q_proteus","kind","proteus","reference","bf8aacba-3de9-4b10-961c-47ada80dfe8c","state","completed","thumbnail_url","https://proteus.grupoq.io/videos/bf8aacba-3de9-4b10-961c-47ada80dfe8c/thumbnailsthumb.0000000.jpg","https://proteus.grupoq.io/videos/bf8aacba-3de9-4b10-961c-47ada80dfe8c/levels.m3u8",[121],{"_21":122,"_33":123,"_35":124,"_125":126,"_127":128,"_98":129,"_100":129,"_23":130,"_102":124,"_137":138},"96193fa0-9495-45b2-81cc-b547604354af","Física Térmica - Termologia","fisica-termica-termologia","tag_group_id","c1ce2cf2-b217-4cc7-8182-81c56bd3522d","parent_id","c8ab2a95-fd84-4d6f-ade0-835d34ba00f9","2025-04-29T03:44:27.560682+00:00",{"_131":132,"_133":134,"_135":136},"childrenCount",10,"content_count",0,"question_count",8575,"children",[],"video",{"_21":93,"_141":88,"_89":-5,"_142":143,"_144":145,"_6":-5,"_146":-5,"_106":145,"_147":148,"_117":-5,"_149":-5,"_150":-5,"_151":-5,"_152":-5,"_23":153,"_154":134,"_155":-5,"_79":156,"_98":157,"_100":157},"title","duration",17,"source_type","prometheus","iframe_url","provider_video_id","748a4adb-ad8f-4c5f-88a9-bc522d3b4246","format","quality","file_path","file_size",{"_96":97},"views_count","last_played_at","draft","2025-08-19T11:56:22.11908+00:00","tag",{"_21":122,"_33":123,"_35":124,"_125":126,"_127":128,"_98":129,"_100":129,"_23":160,"_102":124,"_137":161},{"_131":132,"_133":134,"_135":136},[],"similarQuestions",[164,196,216],{"_18":165,"_20":19,"_21":166,"_60":167,"_76":184,"_77":185,"_29":186},"112831da-be9c-458e-94cb-e8292d0dba12","3c0b9441-b878-4896-8bac-fa4ca61e3f13",[168,171,174,177,181],{"_21":169,"_64":65,"_66":170},"265bd71a-6749-41f5-b291-67efd646ca64","y'' + 2y' - 3y = 0",{"_21":172,"_64":70,"_66":173},"6d3c3a1d-8e80-4ff3-b97a-d5b5bca91940","6y'' - y' - y = 0",{"_21":175,"_64":74,"_66":176},"4168ac67-64fd-46ed-a69c-a01dbfcde7ea","y'' - 2y' + y = 0",{"_21":178,"_64":179,"_66":180},"cc7bc8df-6995-4264-ac5a-32ea9b4ed7db","D","9y'' + 6y' + y = 0",{"_21":165,"_64":182,"_66":183},"E","y'' - 2y' + 6y = 0","Somente em y''−2y'+6y=0 o polinômio característico r²−2r+6=0 tem Δ<0, gerando raízes complexas conjugadas (1±i√5) e, portanto, solução em termos de exponencial modulando seno e cosseno. Nos demais itens (a–d) o discriminante é ≥0, produzindo raízes reais (distintas ou repetidas).","

Resolva as seguintes EDOs determinando a solução geral e, quando houver condições iniciais do PVI, a solução particular.

(a) y'' + 2y' - 3y = 0

(b) 6y'' - y' - y = 0

(d) 9y'' + 6y' + y = 0

(e) y'' - 2y' + 6y = 0

(f) 4y'' + 9y = 0

(g) 6y'' - 5y' + y = 0; \\, y(0) = 4; \\, y'(0) = 0

(h) y'' + 4y' + 4y = 0; \\, y(-1) = 2; \\, y'(-1) = 1

(i) y'' + y = 0; \\, y\bigg(\\frac{\\pi}{3}\\bigg) = 2; \\, y'\\bigg(\\frac{\\pi}{3}\\bigg) = -4

(j) y'' - 2y' - 3y = 3e^{2t}

(k) y'' + 9y = t^2 e^{3t} + 6

(l) 2y'' + 3y' + y = t^2 + 3 \\sin(t)

(m) y'' + y' - 2y = 2t; \\, y(0) = 0; \\, y'(0) = 1

(n) y'' - 2y' + y = te^t + 4; \\, y(0) = 1; \\, y'(0) = 1

(o) y'' + 4y = 3 \\sin(2t); \\, y(0) = 2; \\, y'(0) = -1

",[187],{"_21":188,"_33":189,"_35":190,"_125":126,"_127":191,"_98":192,"_100":192,"_23":193,"_102":190},"6516bbbd-f2a3-4710-8382-702240b17836","Mecânica na Engenharia de Petróleo","mecanica-na-engenharia-de-petroleo","b787e438-0ab3-454c-ab43-5d3d14c2720d","2025-04-29T03:44:35.328997+00:00",{"_131":194,"_133":134,"_135":195},4,12302,{"_18":197,"_20":19,"_21":198,"_60":199,"_76":211,"_77":212,"_29":213},"6831a9b9-c9a4-4a76-bd7a-2ce98bfea875","93a32dd4-5fc6-4ccb-a76f-4724bf113742",[200,203,206,208],{"_21":201,"_64":65,"_66":202},"13e3f476-a0a5-421f-b47e-0969e8e9a7e0","

Verdadeiro, verdadeiro, falso

",{"_21":204,"_64":70,"_66":205},"c9a20855-d84b-4860-8b35-9784818282cf","

Falso, verdadeiro, verdadeiro

",{"_21":197,"_64":74,"_66":207},"

Verdadeiro, falso, verdadeiro

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Falso, falso, falso

","85,5 % decomposto → 14,5 % restante.\nN/N0 = 0,145 ⇒ t = ln(1/0,145)/(ln2/5730) ≈ 1,6×10⁴ anos.\nItens prováveis: (1) resta 14,5 % do C-14 (V); (2) idade ≈ 1,2×10⁴ anos ou 3 meias-vidas (F); (3) t½ do C-14 = 5730 anos (V). Sequência: V-F-V, correspondendo à alternativa c.","

Qual é a idade da madeira na qual 85,5\\% do C-14 se decompos?

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a) ????3 de ????4????5
b) ????2 de ????2????????2
c) ????1 de 2????????1
d) ????1 de 2????2????",[237],{"_21":188,"_33":189,"_35":190,"_125":126,"_127":191,"_98":192,"_100":192,"_23":238,"_102":190},{"_131":194,"_133":134,"_135":195},[240,242,249,259,266,273,275,283,289,294,300,307],{"_21":188,"_33":189,"_35":190,"_125":126,"_127":191,"_98":192,"_100":192,"_23":241,"_102":190},{"_131":194,"_133":134,"_135":195},{"_21":243,"_33":41,"_35":42,"_125":126,"_127":244,"_98":129,"_100":129,"_23":245,"_102":248},"6b6faf95-0e3a-4f58-abc8-e1444c48041d","92339f4f-ed20-4f4c-ad85-0c3de7e04ae0",{"_131":246,"_133":134,"_135":247},2,11846,"termodinamica-3",{"_21":250,"_33":251,"_35":252,"_125":126,"_127":253,"_98":254,"_100":254,"_23":255,"_102":258},"861ad829-750d-4a44-9569-2f18b430b4df","Engenharia Mecatrônica","engenharia-mecatronica","eb9315c5-bd04-4116-aa46-02c4fde320c0","2025-04-29T02:19:12.828432+00:00",{"_131":256,"_133":134,"_135":257},5,30614,"engenharia-mecatronica-1",{"_21":260,"_33":261,"_35":262,"_125":126,"_127":250,"_98":192,"_100":192,"_23":263,"_102":265},"88fe96b3-2a17-4198-90d5-ddda3d6f5d45","Mecânica","mecanica",{"_131":256,"_133":134,"_135":264},25741,"mecanica-3",{"_21":244,"_33":267,"_35":268,"_125":126,"_127":253,"_98":254,"_100":254,"_23":269,"_102":272},"Engenharia Mecânica","engenharia-mecanica",{"_131":270,"_133":134,"_135":271},11,36318,"engenharia-mecanica-2",{"_21":122,"_33":123,"_35":124,"_125":126,"_127":128,"_98":129,"_100":129,"_23":274,"_102":124},{"_131":132,"_133":134,"_135":136},{"_21":276,"_33":277,"_35":278,"_125":126,"_127":-5,"_98":279,"_100":279,"_23":280,"_102":278},"9772e958-72c6-4499-ad47-877cf94d670d","Exatas","exatas","2025-04-29T01:56:45.284172+00:00",{"_131":281,"_133":134,"_135":282},18,135489,{"_21":284,"_33":41,"_35":42,"_125":126,"_127":188,"_98":285,"_100":285,"_23":286,"_102":288},"b21374de-aae5-4a4a-9bf3-0420e731797e","2025-04-29T04:00:14.680867+00:00",{"_131":134,"_133":134,"_135":287},8597,"termodinamica-5",{"_21":191,"_33":290,"_35":291,"_125":126,"_127":253,"_98":254,"_100":254,"_23":292,"_102":293},"Engenharia de Petróleo","engenharia-de-petroleo",{"_131":256,"_133":134,"_135":195},"engenharia-de-petroleo-1",{"_21":128,"_33":295,"_35":296,"_125":126,"_127":276,"_98":254,"_100":254,"_23":297,"_102":299},"Física","fisica",{"_131":270,"_133":134,"_135":298},13777,"fisica-4",{"_21":253,"_33":301,"_35":302,"_125":126,"_127":-5,"_98":303,"_100":303,"_23":304,"_102":302},"Engenharia","engenharia","2025-04-29T01:55:38.635246+00:00",{"_131":305,"_133":134,"_135":306},29,351586,{"_21":308,"_33":41,"_35":42,"_125":126,"_127":260,"_98":309,"_100":309,"_23":310,"_102":311},"f5967cbe-d751-4b40-81f2-04eb5dead2a9","2025-04-29T04:00:13.215003+00:00",{"_131":134,"_133":134,"_135":287},"termodinamica-4","tagsTree",[314,323],{"_21":276,"_33":277,"_35":278,"_125":126,"_127":-5,"_98":279,"_100":279,"_23":315,"_102":278,"_137":316},{"_131":281,"_133":134,"_135":282},[317],{"_21":128,"_33":295,"_35":296,"_125":126,"_127":276,"_98":254,"_100":254,"_23":318,"_102":299,"_137":319},{"_131":270,"_133":134,"_135":298},[320],{"_21":122,"_33":123,"_35":124,"_125":126,"_127":128,"_98":129,"_100":129,"_23":321,"_102":124,"_137":322},{"_131":132,"_133":134,"_135":136},[],{"_21":253,"_33":301,"_35":302,"_125":126,"_127":-5,"_98":303,"_100":303,"_23":324,"_102":302,"_137":325},{"_131":305,"_133":134,"_135":306},[326,335,341],{"_21":250,"_33":251,"_35":252,"_125":126,"_127":253,"_98":254,"_100":254,"_23":327,"_102":258,"_137":328},{"_131":256,"_133":134,"_135":257},[329],{"_21":260,"_33":261,"_35":262,"_125":126,"_127":250,"_98":192,"_100":192,"_23":330,"_102":265,"_137":331},{"_131":256,"_133":134,"_135":264},[332],{"_21":308,"_33":41,"_35":42,"_125":126,"_127":260,"_98":309,"_100":309,"_23":333,"_102":311,"_137":334},{"_131":134,"_133":134,"_135":287},[],{"_21":244,"_33":267,"_35":268,"_125":126,"_127":253,"_98":254,"_100":254,"_23":336,"_102":272,"_137":337},{"_131":270,"_133":134,"_135":271},[338],{"_21":243,"_33":41,"_35":42,"_125":126,"_127":244,"_98":129,"_100":129,"_23":339,"_102":248,"_137":340},{"_131":246,"_133":134,"_135":247},[],{"_21":191,"_33":290,"_35":291,"_125":126,"_127":253,"_98":254,"_100":254,"_23":342,"_102":293,"_137":343},{"_131":256,"_133":134,"_135":195},[344],{"_21":188,"_33":189,"_35":190,"_125":126,"_127":191,"_98":192,"_100":192,"_23":345,"_102":190,"_137":346},{"_131":194,"_133":134,"_135":195},[347],{"_21":284,"_33":41,"_35":42,"_125":126,"_127":188,"_98":285,"_100":285,"_23":348,"_102":288,"_137":349},{"_131":134,"_133":134,"_135":287},[],"videoDislikes",{},"videoLikes",{},"actionData","errors"]

Comentários