Water at 58C is being used to cool apples from an initial temperature of 208 to 88C. The water flow over the surface of the apple creates a convective heat-transfer coefficient of 10 W/(m2 K). Assume the apple can be described as a sphere with an 8-cm diameter and the geometric center is to be reduced to 88C. The apple properties include thermal conductivity of 0.4 W/(m K), specific heat of 3.8 kJ/(kg K), 3 and density of 960 kg/m . Determine the time that the apples must be exposed to the water.

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2d

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Power braking's benefits

Among the big advantages of a power braking system are it's: Regarded as safer. The heat caused by the friction of drum brakes causes them to wear down. Because disc brake systems have better heat distribution, they're more efficient

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