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3 years ago

What are the cause of eye strain during computer usage?

Computers and Technology

1 answer:

Natasha2012 [34]3 years ago

5 0

It happens because your eyes follow the same path over and over. And it can get worse the longer you continue the movement. When you work at a computer, your eyes have to focus and refocus all the time. They move back and forth as you read. You may have to look down at papers and then back up to type. Your eyes react to changing images on the screen to create so your brain can process what you’re seeing. All these jobs require a lot of effort from your eye muscles. And to make things worse, unlike a book or piece of paper, the screen adds contrast, flicker, and glare.

You’re more likely to have problems if you already have eye trouble, if you need glasses but don't have them, or if you wear the wrong prescription for computer use.

Computer work gets harder as you age and the lenses in your eyes becomes less flexible. Somewhere around age 40, your ability to focus on near and far objects will start to go away. Your eye doctor will call this condition presbyopia.

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is a shell program in Windows that holds individual utilities called snap-ins, designed for administration and troubleshooting.

spayn [35]

Answer:

Microsoft Management Console (MMC)

Explanation:

The Microsoft Management Console (MMC) is an administrative tool and shell program that holds individual utilities called snap-ins, designed for administration and troubleshooting. it function is to enable administrator to customize management tools by selecting from a list of available snap-ins in the device manager.

7 0

3 years ago

Write an application that displays a series of at least five student ID numbers (that you have stored in an array) and asks the

babymother [125]

Answer:

See explaination for the program code

Explanation:

// ScoreException.java

class ScoreException extends Exception

{

ScoreException(String msg)

{

super(msg);

}

// TestScore.java

import java.util.Scanner;

public class TestScore

{

public static void main(String args[]) throws ScoreException

{

Scanner sc = new Scanner(System.in);

int studentId[] = { 1201, 1202, 1203, 1204, 1205 };

int scores[] = new int[5];

int score = 0;

for(int i = 0; i < studentId.length; i++)

{

try

{

System.out.print("Enter a numeric test score for the student"+(i+1)+" of Id "+studentId[i]+" : ");

score = sc.nextInt();

if(score < 0 || score > 100)

{

scores[i] = 0;

throw new ScoreException("Input should be between 1 and 100");

}

else

{

scores[i] = score;

}

catch(ScoreException ex)

{

System.out.println("\n"+ex.getMessage()+"\n");

}

//displaying student details

System.out.println("\n\nStudent Id \t Score ");

System.out.println("=============================");

for(int i = 0; i < studentId.length; i++)

{

System.out.println(studentId[i]+"\t\t"+scores[i]);

}

8 0

4 years ago

Rafael needs to add a title row to a table that he has inserted in Word. What should he do? Use the alignment options. Use the M

raketka [301]

Answer:

Answer is C

Explanation:

6 0

3 years ago

Read 2 more answers

Write a program that lets the user play the game of Rock, Paper, Scissors against the computer. The program should work as follo

kakasveta [241]

A program that lets the user play the game of Rock, Paper, Scissors against the computer.

Explanation:

a. When the program begins, the user enters his or her choice of "rock", "paper", or "scissors" at the keyboard using a menu in a function, userChoice, that returns a character.

b. Next, there should be a function, computerChoice, that generates the computer’s play. A random number in the range of 1 through 3 is generated. (NOTE: You’ll have to do some research on how to create random numbers correctly.) If the number is 1, then the computer has chosen rock. If the number is 2, then the computer has chosen paper. If the number is 3, then the computer has chosen scissors. The computer’s choice is returned as a character

c. After, a function, determineWinner, will determine the winner between the user’s choice vs. the computer’s choice.The result is selected according to the following rules:

d. Finally, after a result is selected, there should be a function, playAgain, in which the player should have the option of playing again. This should return a boolean.

#include <iostream>

#include <stdlib.h>

int main() {

srand (time(NULL));

int computer = rand() % 3 + 1;

int user = 0;

std::string roc = "1) Rock\n";

std::string pap = "2)Paper\n";

std::string sci = "3) Scissors\n";

std::cout << "rock paper scissors!\n";

std::cout << roc;

std::cout << pap;

std::cout << sci;

std::cout << "Choose: ";

std::cin >> user;

std::cout << "\nYou choose ";

switch(user){

case 1 :

std::cout << roc;

break;

case 2 :

std::cout << pap;

break;

case 3 :

std::cout << sci;

break;

default :

std::cout << "Invalid Option\n";

}

std::cout << "Comp choose ";

switch(computer){

case 1 :

std::cout << roc;

break;

case 2 :

std::cout << pap;

break;

case 3 :

std::cout << sci;

break;

default :

std::cout << "Invalid Option\n";

}

if(user == computer){

std::cout << "Draw Game\n";

}

else if(user == 1 && computer == 3){

std::cout << "You Win\n";

}

else if(user == 3 && computer == 2){

std::cout << "You Win\n";

}

else if(user == 2 && computer == 1){

std::cout << "You Win\n";

}

else{

std::cout << "Computer Wins!\n";

}

7 0

3 years ago

Your new home has a vacuum system. what kind of computer is controlling it?

Scrat [10]

The answer is embedded computer. It is a PC framework with a committed capacity inside a bigger mechanical or electrical framework, frequently with ongoing figuring constraints. It is implanted as a component of a total gadget regularly including equipment and mechanical parts. Installed frameworks control numerous gadgets in like manner utilize today.

6 0

4 years ago