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Transformation of stress in the plane.

",{"_44":88,"_83":89,"_85":90},"8fe73353-a58a-4aed-b557-898569cfc3c3","B","

Principal stresses and maximum shear stress in the plane.

",{"_44":92,"_83":93,"_85":94},"4ed74f68-2c6e-44c5-8df7-a81ac6f2699f","C","

Mohr's circle.

","solution_explanation","statement","

What is the topic of the lesson described in the text?

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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

",[227],{"_44":228,"_55":229,"_57":230,"_144":145,"_146":231,"_117":232,"_119":232,"_46":233,"_121":230},"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",{"_149":234,"_151":152,"_153":235},4,12302,{"_40":237,"_42":43,"_44":238,"_80":239,"_95":251,"_96":252,"_51":253},"6831a9b9-c9a4-4a76-bd7a-2ce98bfea875","93a32dd4-5fc6-4ccb-a76f-4724bf113742",[240,243,246,248],{"_44":241,"_83":84,"_85":242},"13e3f476-a0a5-421f-b47e-0969e8e9a7e0","

Verdadeiro, verdadeiro, falso

",{"_44":244,"_83":89,"_85":245},"c9a20855-d84b-4860-8b35-9784818282cf","

Falso, verdadeiro, verdadeiro

",{"_44":237,"_83":93,"_85":247},"

Verdadeiro, falso, verdadeiro

",{"_44":249,"_83":219,"_85":250},"3c98539b-1af9-4d44-aecd-c266754a2075","

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????",[277],{"_44":228,"_55":229,"_57":230,"_144":145,"_146":231,"_117":232,"_119":232,"_46":278,"_121":230},{"_149":234,"_151":152,"_153":235},[280,282,291,297,301,303,305,313,318,326,328,333,339],{"_44":228,"_55":229,"_57":230,"_144":145,"_146":231,"_117":232,"_119":232,"_46":281,"_121":230},{"_149":234,"_151":152,"_153":235},{"_44":283,"_55":284,"_57":285,"_144":145,"_146":286,"_117":161,"_119":161,"_46":287,"_121":290},"861ad829-750d-4a44-9569-2f18b430b4df","Engenharia Mecatrônica","engenharia-mecatronica","eb9315c5-bd04-4116-aa46-02c4fde320c0",{"_149":288,"_151":152,"_153":289},5,30614,"engenharia-mecatronica-1",{"_44":292,"_55":62,"_57":63,"_144":145,"_146":293,"_117":294,"_119":294,"_46":295,"_121":296},"8850e507-a691-4d45-a7c7-16221e9c5af2","88fe96b3-2a17-4198-90d5-ddda3d6f5d45","2025-04-29T04:00:13.215003+00:00",{"_149":152,"_151":152,"_153":171},"resistencia-dos-materiais-6",{"_44":293,"_55":159,"_57":160,"_144":145,"_146":283,"_117":232,"_119":232,"_46":298,"_121":300},{"_149":288,"_151":152,"_153":299},25741,"mecanica-3",{"_44":141,"_55":142,"_57":143,"_144":145,"_146":-5,"_117":147,"_119":147,"_46":302,"_121":143},{"_149":150,"_151":152,"_153":154},{"_44":168,"_55":62,"_57":63,"_144":145,"_146":158,"_117":169,"_119":169,"_46":304,"_121":172},{"_149":152,"_151":152,"_153":171},{"_44":306,"_55":307,"_57":308,"_144":145,"_146":286,"_117":161,"_119":161,"_46":309,"_121":312},"b6e37f32-f8e5-4025-bf0f-69ffc00fb331","Engenharia Civil","engenharia-civil",{"_149":310,"_151":152,"_153":311},21,45865,"engenharia-civil-3",{"_44":231,"_55":314,"_57":315,"_144":145,"_146":286,"_117":161,"_119":161,"_46":316,"_121":317},"Engenharia de Petróleo","engenharia-de-petroleo",{"_149":288,"_151":152,"_153":235},"engenharia-de-petroleo-1",{"_44":319,"_55":320,"_57":321,"_144":145,"_146":306,"_117":322,"_119":322,"_46":323,"_121":325},"c5bf57d4-c3d8-4365-b53e-085fa14a3a95","Estruturas","estruturas","2025-04-29T03:44:32.303369+00:00",{"_149":288,"_151":152,"_153":324},8852,"estruturas-1",{"_44":158,"_55":159,"_57":160,"_144":145,"_146":141,"_117":161,"_119":161,"_46":327,"_121":165},{"_149":163,"_151":152,"_153":164},{"_44":329,"_55":62,"_57":63,"_144":145,"_146":228,"_117":330,"_119":330,"_46":331,"_121":332},"d1e4567b-f68a-49e1-b3e5-3888343d7871","2025-04-29T04:00:14.680867+00:00",{"_149":152,"_151":152,"_153":171},"resistencia-dos-materiais-7",{"_44":334,"_55":335,"_57":63,"_144":145,"_146":319,"_117":336,"_119":336,"_46":337,"_121":338},"da8d2ecf-e949-4afc-966f-98b4b367fac1","Resistencia dos Materiais","2025-04-29T04:00:06.9766+00:00",{"_149":152,"_151":152,"_153":171},"resistencia-dos-materiais-5",{"_44":286,"_55":340,"_57":341,"_144":145,"_146":-5,"_117":342,"_119":342,"_46":343,"_121":341},"Engenharia","engenharia","2025-04-29T01:55:38.635246+00:00",{"_149":344,"_151":152,"_153":345},29,351586,"tagsTree",[348,357],{"_44":141,"_55":142,"_57":143,"_144":145,"_146":-5,"_117":147,"_119":147,"_46":349,"_121":143,"_155":350},{"_149":150,"_151":152,"_153":154},[351],{"_44":158,"_55":159,"_57":160,"_144":145,"_146":141,"_117":161,"_119":161,"_46":352,"_121":165,"_155":353},{"_149":163,"_151":152,"_153":164},[354],{"_44":168,"_55":62,"_57":63,"_144":145,"_146":158,"_117":169,"_119":169,"_46":355,"_121":172,"_155":356},{"_149":152,"_151":152,"_153":171},[],{"_44":286,"_55":340,"_57":341,"_144":145,"_146":-5,"_117":342,"_119":342,"_46":358,"_121":341,"_155":359},{"_149":344,"_151":152,"_153":345},[360,369,378],{"_44":283,"_55":284,"_57":285,"_144":145,"_146":286,"_117":161,"_119":161,"_46":361,"_121":290,"_155":362},{"_149":288,"_151":152,"_153":289},[363],{"_44":293,"_55":159,"_57":160,"_144":145,"_146":283,"_117":232,"_119":232,"_46":364,"_121":300,"_155":365},{"_149":288,"_151":152,"_153":299},[366],{"_44":292,"_55":62,"_57":63,"_144":145,"_146":293,"_117":294,"_119":294,"_46":367,"_121":296,"_155":368},{"_149":152,"_151":152,"_153":171},[],{"_44":306,"_55":307,"_57":308,"_144":145,"_146":286,"_117":161,"_119":161,"_46":370,"_121":312,"_155":371},{"_149":310,"_151":152,"_153":311},[372],{"_44":319,"_55":320,"_57":321,"_144":145,"_146":306,"_117":322,"_119":322,"_46":373,"_121":325,"_155":374},{"_149":288,"_151":152,"_153":324},[375],{"_44":334,"_55":335,"_57":63,"_144":145,"_146":319,"_117":336,"_119":336,"_46":376,"_121":338,"_155":377},{"_149":152,"_151":152,"_153":171},[],{"_44":231,"_55":314,"_57":315,"_144":145,"_146":286,"_117":161,"_119":161,"_46":379,"_121":317,"_155":380},{"_149":288,"_151":152,"_153":235},[381],{"_44":228,"_55":229,"_57":230,"_144":145,"_146":231,"_117":232,"_119":232,"_46":382,"_121":230,"_155":383},{"_149":234,"_151":152,"_153":235},[384],{"_44":329,"_55":62,"_57":63,"_144":145,"_146":228,"_117":330,"_119":330,"_46":385,"_121":332,"_155":386},{"_149":152,"_151":152,"_153":171},[],"videoDislikes",{},"videoLikes",{},"actionData","errors"]

Comentários