A piece of thick beef 10 cm beaks will be frozen in the freezing room -35 ° C.The products have 73% water content, the mass of 970 kg / m³, and thermal conductivity (frozen) of 1.1 w / (m k). Instruct time freezing using the plank equation. This product has a frozen temperature of -1.75 ° C, and air movement in the frozen room provides a convection heat transfer coefficient of 10 W / (m² k). t f = answer

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