Answer:
A. The mixture contains compounds with similar polarities but different solubilities.
Explanation:
Liquid – Liquid (LLE) extraction is a process for the isolation of compounds or metal complexes, also known as solvent extraction and partitioning, based on their relative solubility in two distinct liquids, generally water- (polar) liquids and an organic solvent (non-polar). Net transition from a liquid to a liquid process of one or more species, normally from aqueous to organic.
Construct a class that will model a quadratic expression (ax^2 + bx + c). In addition to a constructor creating a quadratic expression, the following operations can be performed:
- query quadratic expression for each coefficient
- evaluate the quadratic expression at a specified value
- determine the number of real zeros (solutions to associated quadratic equation)
- determine the real zeros
Also construct a test program which will test whether your implementation of this class is correct.
Answer:
Following are the code to this question:
#include <iostream>//header file
#include<math.h>//header file
using namespace std;
class Quadratic//defining a class Quadratic
{
private:
double a,b,c;//defining a double variable
public:
Quadratic()//defining default constructor
{
a = 0;//assigning value 0
b = 0;//assigning value 0
c = 0;//assigning value 0
}
Quadratic(double a, double b, double c)//defining a parameterized constructor
{
this->a = a;//use this keyword to hold value in a variable
this->b = b;//use this keyword to hold value in b variable
this->c = c;//use this keyword to hold value in c variable
}
double getA() //defining a get method
{
return a;//return value a
}
void setA(double a)//defining a set method to hold value in parameter
{
this->a = a;//assigning value in a variable
}
double getB() //defining a get method
{
return b;//return value b
}
void setB(double b)//defining a set method to hold value in parameter
{
this->b = b;//assigning value in b variable
}
double getC() //defining a get method
{
return c;//return value c
}
void setC(double c)//defining a set method to hold value in parameter
{
this->c = c;//assigning value in c variable
}
double Evaluate(double x)//defining a method Evaluate to hold value in parameter
{
return ((a*x*x)+(b*x)+c);//return evaluated value
}
double numberOfReal()//defining a method numberOfReal to calculates the real roots
{
return (b*b)-(4*a*c);//return real roots
}
void findroots()//defining a method findroots
{
double d=numberOfReal();//defining double variable to hold numberOfReal method value
if(d<0)//use if block to check value of d less than 0
cout<<"Equation has no real roots"<<endl;//print message
else
{
double r1=(-b+sqrt(numberOfReal()))/(2*a);//holding root value r1
double r2=(-b-sqrt(numberOfReal()))/(2*a);//holding root value r2
if(r1==r2)//defining if block to check r1 equal to r2
cout<<"Equation has one real root that is "<<r1<<endl;//print message with value
else//else block
cout<<"The equation has two real roots that are "<<r1<<" and "<<r2<<endl;////print message with value
}
}
void print()//defining a method print
{
cout<< a << "x^2 + " << b << "x + " << c <<endl;//print Quadratic equation
}
};
int main()//defining main method
{
Quadratic q(5,6,1);//creating Quadratic class object that calls parameterized constructor
q.print();//calling print method
cout<<q.numberOfReal()<<endl;//calling method numberOfReal that prints its value
q.findroots();//calling method findroots
cout<<q.Evaluate(-1);//calling method Evaluate that prints its value
return 0;
}
Output:
5x^2 + 6x + 1
16
The equation has two real roots that are -0.2 and -1
0
Explanation:
In the above code, a class "Quadratic" is declared, which is used to define a default and parameter constructor to holds its parameter value.
In the next step, the get and set method is defined that holds and returns the quadratic value, and "Evaluate, numberOfReal, findroots, and print" in the evaluate method a double variable is used as a parameter that returns evaluated value.
In the "numberOfReal" method it calculates the real roots and returns its value. In the "findroots" method a double variable "d" is declared that hold "numberOfReal" value,
and use a conditional statement to check its value, and in the print method, it prints the quadratic equation.
In the main method, the lass object it calls the parameterized constructor and other methods.
design an algorithm to generate the first n terms of sequence 2,6,10,14
Answer:
#Begin
a=2
k=0
temp=0
#Input
k=input()
temp=k
k=0
#Processing
while int(k)<int(temp):
print(a)
a=a+4
k=k+1
In this exercise, using the knowledge of computational language in python, we have that this code will be written as:
The code is in the attached image.
What is range?The Python range function is a function native to the Python language that is used to generate a numerical sequence within a given range. It is normally used as an auxiliary to the for function. In Python, we can repeat an action a specified number of times using a for loop with the range function.
We can write the python as:
a=2
k=0
temp=0
k=input()
temp=k
k=0
while int(k)<int(temp):
print(a)
a=a+4
k=k+1
See more about python at brainly.com/question/13437928
In what way, if any, is a model different from a simulation?
Models are types of simulations that transform data sets into scenarios.
Models and simulations are completely different in that they achieve different results.
Models and simulations are essentially identical—they are two terms that describe the same thing.
Models are types of simulations that create ideal workers and members of leadership.
Answer:
Models and Simulations are completely different in that they achieve diffenet results.
Explanation:
Modeling is the act of building a model. A simulation is the process of using a model to study the behavior and performance of an actual or theoretical system. In a simulation, models can be used to study existing or proposed characteristics of a system. ... Simulating is the act of using a model for a simulation.
Answer:
Models are types of simulations that transform data sets into scenarios
Explanation:
Model - computer models take complex data sets and transform them into real-life simulations
Please read this lab exercise thoroughly, before attempting to write the program.
Write a program that reads the pairs of group number and student count from the text file (user must enter name of file) and:
Displays the number of groups in the file (5 %)
Displays the number of even and odd student count (5%)
Displays the sum of the even student count and the sum of the odd student count as well as the sum of all the student count (5%)
Displays the group numbers of the largest student count and the smallest student count (5 %)
Computes the average of the largest and smallest student count (10 %)
Compute the sum of ALL the digits in the largest student count (i.e. 952 – Sum is 9+5+2 = 16) (15 %)
Assume the contents of the file are as follows but that the pairs of data can change later:
1 25
2 123
3 475
4 61
5 77
6 910
7 234
8 138
9 134
10 95
11 674
12 345
13 31
14 211
15 952
16 873
17 22
18 7
19 876
20 347
21 450
The following is a sample output: User input in red
What is name of the input file? integers.dat
The number of groups in the file is 21
There are 12 odd student count and 9 even student count
The sum of the odd student count is 2645
The sum of the even student count is 4390
The sum of all the student count is 7035
The group number of the largest student count is 15
The group number of the smallest student count is 18
The average of 952 and 7 is 479.5
The sum of all the digits in the largest student count is 16
NOTE:
Use two decimal point precision for the average
To check your code, adjust one of the student count in the file, recompile your code and run again (suggest changing the largest or smallest student count )
Even though there are 21 pairs of numbers in the file, the program should NOT presume there will always be 21 pairs of numbers. In other words, you should not solve this problem by declaring 21 pairs of values. If I choose to use another integers.dat file other than the one provided with the assignment, your program should still work correctly with that file as well. All you can assume is that a series of integers will be read in from the file. Therefore, you need to implement a solution that uses the repetition control structures (for, while, do…while) in the reading and processing of these values to produce your output.
Answer:
filename = input("Enter input file? ")
with open(filename, 'r') as data:
num_groups = []
num_counts = []
for line in data:
cols = line.split()
num_groups.append(int(cols[0]))
num_counts.append(int(cols[1]))
print("The number of num_groups in the file is "+str(len(num_groups)))
c_even = 0; c_odd = 0; s_odd = 0; s_even = 0
for i in num_counts:
if i%2 == 0:
c_even=c_even+1
s_even = s_even + i
else:
c_odd=c_odd+1
s_odd = s_odd + i
print("There are "+str(c_odd)+" odd student and "+str(c_even)+" even student")
print("The sum of odd student is "+str(s_odd))
print("The sum of even student is "+str(s_even))
print("The sum of all student is "+str(s_even+s_odd))
max_count = num_groups[num_counts.index(max(num_counts))]
print("The group number of the largest student is "+str(max_count))
min_count = num_groups[num_counts.index(min(num_counts))]
print("The group number of the smallest student is "+str(min_count))
print("The average of "+str(max(num_counts))+" and "+str(min(num_counts))+" is:",end=" ")
print("%.2f" % ((max(num_counts)+min(num_counts))*0.5))
bigkount = str(max(num_counts))
bigsum = 0
for i in range(len(bigkount)):
bigsum += int(bigkount[i])
print("The sum of all the digits in the largest student is: "+str(bigsum))
Explanation:
The program was written in Python.
Because of the length, I added an attachment where I used comments to explain the lines of the code
what are node in a computer network
Answer:
A node is a connection point inside a network that can receive, send, create, or store data. Each node requires you to provide some form of identification to receive access, like an IP address. A few examples of nodes include computers, printers, modems, bridges, and switches.
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