Due to its high melting temperature (~ 2450 °C), beryllium oxide is used as refractory material in combustion chambers/furnaces. The purpose of the refractory is containment of the combustion process and flue gas, re-radiation of heat to accelerate the combustion process and protection of personnel through its insulating properties. The wall of a furnace separates combustion gases at 2600 °C from a liquid coolant at 100 °C, with gas and liquid-side convection coefficients of 50 and 1000 W/m2K. The composite wall is composed of a 10 mm thick layer of beryllium oxide on the gas side (kBO = 15 W/mK at an assumed average temperature of 2000 K) and a 20 mm thick slab of stainless steel on the liquid side (kss = 16.6 W/mK at an assumed average temperature of 400 K). The contact resistance between the oxide and the steel is 0.05 m2K/W.

answer:

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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

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Explanation:

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