PhysicsThe rate of cooling at , if surrounding temperature is , is . The rate of cooling at is:


The rate of cooling at , if surrounding temperature is , is . The rate of cooling at is:


  1. A
    16/3H
  2. B
    2H
  3. C
    3H
  4. D
    2/3H 

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    Solution:

    Concept-The relationship between the thickness of the ice cover and the temperature history is described by Stefan's equation (or Stefan's formula). It specifically states that the square root of the number of degree days below freezing determines the projected ice accumulation. In order to attain the desired result, we will divide the two equations we will obtain by applying this law. Consult the answer below.
    Equation used:  R=εσ(T4−T04)
    According to Stefan's rule, the rate of cooling is directly inversely related to the difference between the temperatures when they are multiplied by four.
    Let H' represent the cooling rate at 900K.
    T = 900K (given)
    Applying these values to the aforementioned law yields the following error in the maths.
    By Stefan's law, Rate of cooling, Hence, option 1 is correct.
     
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