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Alona [7]
2 years ago
6

Question 3 (2 points)

Computers and Technology
1 answer:
jeyben [28]2 years ago
7 0

Answer:

The energy source that does not use heat in the process of converting it to electricity is;

c. Sunlight

Explanation:

In converting Sunlight energy source to electricity, the photons in the light from the Sun excite electrons in the solar cells silicon layers, such that the electrons travel from n-type silicon layer to the p-type silicon layer creating electric potential energy that does work as the electrons flow back in the form of electricity from the p-type to the n-type silicon layer through an external circuit

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Write a program that reads an unspecified number of integers, determines how many positive and negative values have been read, a
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Answer:

<em>C++</em>

////////////////////////////////////////////////////////////////////////////////////////////////////////

#include <iostream>

#include <vector>

using namespace std;

int main() {

  vector<int> v;

   int n = 1;

   while (n != 0) {

       cout<<"Enter an integer, the input ends if it is 0: ";

       cin>>n;

       v.push_back(n);

   }

   cout<<endl;

   ///////////////////////////////////////////////////////////

   int sum = 0;

   int num_positives = 0, num_negatives = 0;

   for (int i=0; i<v.size()-1; i++) {

       if (v[i] > 0)

           ++num_positives;

       else

           ++num_negatives;

           

       sum = sum + v[i];

   }

   //////////////////////////////////////////////////////////

   cout<<"The number of positives is "<<num_positives<<endl;

   cout<<"The number of negatives is "<<num_negatives<<endl;

   cout<<"The total is "<<sum<<endl;

   cout<<"The average is "<<(float)sum/(v.size()-1);

   ///////////////////////////////////////////////////////////

   return 0;

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Implement one array of the English alphabet (26 characters). a) Create a function, getLetters() to cast and generate the array.
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#include <fstream>

#include <iostream>

#include <iomanip>

#include <cstring>

#include <cstdlib>

using namespace std;

// Function Declarations

void display(char alphabets[],int MAX_SIZE);

void reverse(char alphabets[],int MAX_SIZE);

void swap(char &ch1,char &ch2);

int main() {

 //Declaring constant

const int MAX_SIZE=26;

 

//Declaring a char array

char alphabets[MAX_SIZE];

 

//Populating the array with alphabets

for(int i=0;i<MAX_SIZE;i++)

{

 alphabets[i]=(char)(65+i);

 }

 

 cout<<"Original: ";

 display(alphabets,MAX_SIZE);

 reverse(alphabets,MAX_SIZE);

 cout<<"Reversed: ";

 display(alphabets,MAX_SIZE);

 return 0;

}

//This function will display the array contents

void display(char alphabets[],int MAX_SIZE)

{

 for(int i=0;i<MAX_SIZE;i++)

 {

    cout<<alphabets[i]<<" ";

 }

 cout<<endl;

}

//This function will reverse the array elements

void reverse(char alphabets[],int MAX_SIZE)

{

 int first,last;

 first=0;

 last=MAX_SIZE-1;

 

 while(first<last)

 {

   

    swap(alphabets[first],alphabets[last]);

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 }

}

void swap(char &ch1,char &ch2)

{

 char temp;

 temp=ch1;

 ch1=ch2;

 ch2=temp;

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