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Steel ball memiliki radius 1 . 0 in , dengan suhu 9 0 0 deg F . selanjutnya dimasukkan ke dalam media dengan suhu

Steel ball memiliki radius 1.0 in, dengan suhu 900\deg F. selanjutnya dimasukkan ke dalam media dengan suhu konstan 250\deg F. Asumsi: convective coefficient h =2.0 btu/h ft 2. Hitunglah suhu bola setelah 1 jam, Physical properties : k =25 btu/hftF ; density =550 Ibm/ft3, dan cp 0.11 btu/ Ibm. F

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