A 1000 gal vessel, containing air, is to be vacuum purged to a limiting oxygen concentration of 1 ppm. Determine the number of purge cycles required.

T = 75 F
Initial pressure 760 torr
max vacuum 20 mm Hg
Final pressure 1 atm
Purge gas nitrogen
Answer must be the number of purge cycles needed.

answer:

31

explanation:

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)

true

Explanation:

this is true because it is