Which one is it? Chemical, or ,Mechanical Flakes of brick fall off due to wind and rain.
2 answers:
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Answer:
The time taken is
Explanation:
From the question we are told that
The diameter of the egg is
The initial temperature of egg the
The temperature of the boiling water
The heat transfer coefficient is
The final temperature is
The thermal conductivity of water is
The diffusivity of the egg
Using one term approximation
We have the
The radius is Note that this radius is approximation to that of a real egg
Now we need to obtain the Biot number which help indicate the value of to use in the above equation
The Biot number is mathematically represented as
Substituting values
So for this value which greater than 0.1 the coefficient is
Substituting this into equation 1 we have
Taking natural log of both sides
The time required for the egg to be cooked is mathematically represented as
substituting value is