[br][br]O setor de controle de qualidade de um frigorífico avalia o[br]funcionamento de algumas de suas câmaras de refrigeração. Um boi foi abatido e[br]parte de seu corpo foi colocado em uma câmara, mantida a uma temperatura[br]constante de –10º C, para resfriamento. Nela, instalou-se um termômetro para[br]aferir a oscilação na temperatura desse corpo.[br][br]Considere que a temperatura do corpo, em graus Celsius, varie com o[br]tempo t, em minutos, de acordo com a função [img width=95,height=20]data:image/wmf;base64,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[/img], em que a e b são constantes reais e t, o tempo decorrido após o corpo ser colocado na câmara de refrigeração. Assim, após 80 minutos,[br]foi observado que a temperatura do corpo era de 0ºC e que, após 2 horas e 40[br]minutos, essa temperatura passou para –8ºC.[br][br]Levando-se em consideração essas informações, elabore e execute um plano de resolução de[br]maneira a determinar[br][br][br]a) os valores das constantes reais a e b.[br][br]b) o instante de tempo t, em horas, a partir do qual [img width=72,height=17]data:image/wmf;base64,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[/img].
[br][br][b]Solução[/b]: [br][br]a) A temperatura do corpo, em graus Celsius, varia com o tempo t, em minutos, de acordo com a função T(t) = –10 + a.5[sup]b.t[/sup], em que a e b são constantes reais. Sabemos que T(80) = 0 e que T(160) = –8, já que após 80 minutos a temperatura do corpo era de 0ºC e após 2 horas e quarenta minutos, ou seja, 160 minutos, a temperatura do corpo era de –8ºC.[br][br]Assim,[br][br][img width=104,height=44]data:image/wmf;base64,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[/img].[br][br]Da primeira equação do sistema, obtemos[br][br][img width=121,height=33]data:image/wmf;base64,R0lGODlhlwApAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAMABQCPACAAhAAAAAAAAB0AHQAAHR0AAB0AMgAAMwAcSAAzWh0zWh1JSR1GbDIAHTMAADIdADIAMjMeRzMzWzNbgEgcAFozAFozHVszM0huf11/f2xGHX9uSH9/XWpqamaIiIBbM4iIZgX/ICCOZGmeaKqubOu+pFBOwQHfeK7vfDBcI8oIwSsaj8gWg7QUNZPQqJRnE02m2Kx29MxUAZPFdkw2MoCi73VKCwbE5fjr6SGtpQmAsC5CN+BygSoFXFgPLA0GgosAT3piGURTHgESeiOAihmMgQQBASWgUJ9fjSKWKHk4MnY1nK8iECVEm3wAaACQOT64QiKSLaqwWTSKem8kn8A3jk+OLMLDKBmflSsBxmW4aiXU1d/V0SPVw6wUpSgUA2VdaoAtE+jm6K/0J5tGNOAn2yN3MO9G2EoGbhmWBq5GNEgha4wjbjAmiBOB0J4KcBgzaiQ3wZhFNhj5jSDkpNvGTwFFhCgaOK6gFmMePpKowI4EBTgGVVSYCCCbTDIIyaHQ4MnamKKhbvAEEJRUElHHALGURjVJHl8G/1TdisWSrTqJuIp94VQEJRG+co0wlnOs2xENRXoFUMfW0rd4SdD6ZUJX3r8AsJkQHFXgJ8CI1SFefAMf48cs4kKeTLnyCpqWJxP9hGpHCAA7[/img].[br][br]Daí, substituindo [img width=47,height=33]data:image/wmf;base64,R0lGODlhOwApAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAMABQA1ACAAhAAAAAAAAB0AHQAAHR0AAB0AMgAAMwAcSAAzWh0zWh1JSR1GbDIAHTMAADIAMjMeRzMzWzNbgEgcAFozAFozHVszM0huf11/f2xGHX9uSH9/XWpqamaIiIBbM4iIZgECAwXBICCOZGmepVBKwYG+cEx2wVAuACbvfMmQP1GwR4QNO6VIcXkaAlwiCXMKHOlIOOrUCQVItduXBcx0TkYIcjFDCASU0ZZ6Tq/b7yaM+40vqgATXX1Fgl57e4MlDXJEh46PkJFeBiKFLI6JIpQAHYWZKIuIcyxdATefL2kUIw2oJA4AFTkjWQAKDZt3boKmMyMdm2mfEAA/VwA4aTgZrsLJAKsmtaMBuXG5vSNuwncTNq483OAwD+MyxOYv0eklbdlaIQA7[/img] na segunda equação do sistema,[br][br][img width=185,height=33]data:image/wmf;base64,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[/img][br][br][img width=191,height=33]data:image/wmf;base64,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[/img].[br][br]Logo, [img width=152,height=44]data:image/wmf;base64,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[/img].[br][br]Portanto, a = 50 e [img width=45,height=33]data:image/wmf;base64,R0lGODlhOAApAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIABQAzAB8AhAAAAAAAAB0AHQAAHR0AAAAAMx0AMgAcSAAzWh1GbDIAHTMAADIdADNdXTNbgEgcAEgdHVozAEgzM0huf11/f2xGHX9uSH9/XWaIiIBbM4iIZgECAwECAwECAwECAwECAwWnICCOZGmeaGkJU+q+sBkMcW2n7a3byu7XuZ/Q1BsaS8HjsKg8JkuLJowQCDhOC6t0GN0KF1evL5pNiG+LAiAzeJ5TXcCj9KjaA/R7lRsGmJV6gYEicXMkdXoIbwBga2qLMBVVj5CVlk1UNCN1B5ckZhUjESOKnkyPTEyXnaMinSKGnnUkr3J/lxIAmgC1sZYQI4+9nis5Ci0GI6qVcY8RoKWemSV4JCEAOw==[/img].[br][br]b) Note que[br][br][img width=277,height=29]data:image/wmf;base64,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[/img][br][br][img width=139,height=37]data:image/wmf;base64,R0lGODlhrgAuAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAMABACnACUAhQAAAAAAAB0AHQAAHR0AAAAAMx0dNAAdMgAcSAAzWh0zWh4zRx1IWx1GbDIAHTMAADIdADQdHTIAMjMeRzMzWzNbgEgcAEceM1ozAFozHVszM0YzRltIHUhIW0hZf11/f0huf1luf2xGHW5bNW5bSG5dXX9uSH9/XW5uWX9uWW5ugGaIiIBbM4BuboiIZgECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwb/QIBwSCwaj8cCcslsOp9QpjJKrVqv2Kx2y+1yL96w2Agem63ls1qbXrstgThi2HbbjXA5/c7v+/+AUAF2JgIggUeDiIteAQOMkIuKkX0sAQmUYRxnDplICp5dmKBjDoehAJgmqE1xrq9xdp1/sLWTAKSsWg+6bg+YZgQBDb1Ws8VuE2aTGMN8p4DMzn8eY6AYRBl2wrd919m0W3pIFQAsVyOs40fl51bpRiKxQnkBc0ISTblGyolC2EKIUYGAaF+RfkYUAQQgMApBNwaFuFtyqF0UFBAWMIporknFjlAwaiTXasAhebZcRYQzhQgmESC1PYlg4A7KlAFWBmg55GVMwig0mbAMc68IBpNFdv6b9uRApqJEjkITohRAs4ZOnDp51AUC1iEwxWSM5PVI2DBjmwDbwlEIQi8kcCXFSddVlbYA3naJixfKzZRf+zA489dWYD6DkVBg6xGZlb4ApvKRmaUtNzG11npDcjlM5iKdHYseTbqIgLlQAawrzTqLIyKkfg3R27r2lWNERKS2zRuLZCFrq/Ye/gT3kIX/uBJfHmVVPObQjRhnQjs6cVNFflvfLmQ6EsrciYd+pcQEt3LhkQQBADs=[/img].[br][br]Logo, [img width=173,height=33]data:image/wmf;base64,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[/img] minutos.[br][br]Portanto, o instante de tempo a partir do qual T(t) [img width=12,height=13]data:image/wmf;base64,R0lGODlhDwAQAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAMAAwAIAAoAhAAAAAAAAB0zWh4zRwAzWh1IWzIdADQdHTQdNDQ0NDVIWzVbbkhbblluf2xGHW5bNW5bSG5uWX9uWWaIiAECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwUXICCO5GiUxkCeJXC0YwKLyAwodqDvRAgAOw==[/img] –9,6ºC é t = 4 horas.[br][br]