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Q4. A 0.6 cm diameter steel rod at 38 C is suddenly immersed in a hot liquid at 93 C with a heat transfer coefficient

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Q4. A 0.6 cm diameter steel rod at 38 C is suddenly immersed in a hot liquid at 93 "C with a heat transfer coefficient of h =11 W/mC. The length of the rod is L and it has the following thermophysical properties: k =43 WimC, C, = 473 JkgC, p = 7,801 kg/m' and a = k/pC, = 1.172x10* ms. Determine the time required for the rod to warm to 88 o

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