A plate of 1020 steel (0.2 wt%C) is placed in a carburizing furnace at 900 \[Degree]C. The atmosphere forms a surface layer that is approximately 1.2 wt%C. The diffusion coefficient for C in 1020 steel follows the Arrhenius relationship, D=Subscript[D, 0]exp(-Q/(R T))where the activation energy, Q=80 kJ/mol, and the diffusion coefficient, Subscript[D, 0]=6.2 10^-7 m^2/sec. (a) Plot the concentration profile from the surface of the plate to a depth of 5 mm at times of 30 minutes, 2 hours, and 5 hours. These three curves should be plotted together on the same plot. (b) How long does it take for the carbon content to reach 0.8 wt% at a depth of 1 mm?

answer:

ok yeah for me again

explanation:

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answer:

just reverse the digits.

: )

answer:

// here is code in C++.

#include <bits/stdc++.h>

using namespace std;

//main function

int main()

{

  // variable

 int n;

 cout<<"enter a number:";

 // read the input

 cin>>n;

 // find the square root of the absolute value

 float square_root=sqrt(abs(n));

 // print the square_root

 cout<<"square root of "<<n<<" is: "<<square_root<<endl;

  return 0;

}

Explanation:

Read a number from user and assign it to "n".Then find its absolute value with abs() function.Then calculate the square root of the absolute value with sqrt() function.Print the square root of the number.

Output:

enter a number:-17

square root of -17 is: 4.12311

                                                         This is easy

                                                     sinserly Natalie 7 grader (this is not that hard)