I have a question about my Physics Stack Exchange post: Could you help me please with mathematical model of the soil freezing process?
I got it (I fix my question)
Why is it "On Hold"?
I voted to keep the question closed for similar reasons as what Emilio wrote in a comment to the question: you have a wildly specific equation that must have come from somewhere, didn't they explain what it is and how it's derived?
So while it doesn't seem to be too broad, as was originally closed, it's not clear what research of your own you've done to address the issue. Hence, I voted to keep it closed.
If you provided the resource that gave you the equation and some relevant text around the given equation in that resource, it might be easier for us to understand what is missing and, thus, reopen the question.