Question

The Speed of Sound (Java Project. Please make it easy to understand. I'm a beginner at this. I believe we are supposed to use a switch or if/else) The speed of sound depends on the material the sound is passing through. Below is the approximate speed of sound (in feet per second) for air, water and steel: air: 1,100 feet per second water: 4,900 feet per second steel: 16,400 feet per second Write a program class TheSpeedOfSound that asks the user to enter �air�, �water�, or �steel�, and the distance that a sound wave will travel in the medium. The program should then display the amount of time it will take. You can calculate the amount of time it takes sound to travel in air with the following formula: time = distance/1,100 You can calculate the amount of time it takes sound to travel in watert with the following formula: time = distance/4,900 You can calculate the amount of time it takes sound to travel in steel with the following formula: time = distance/16,400the user should enter an "A" for "air", a "W" for "water, and an "S" for steel and the distance.use the switch statement as part of your solution.display your answer using the printf statement.

Answer 1

Answer:

The program of this question can be given as:

Program:

//import pacakge for user input.

import java.util.Scanner;

//define class  

public class SpeedofSound              

{

  public static void main(String a[]) //define main function

  {  

      //define variable.

      String medium;                            

      double distance,time=0;

      //creating Scanner class object for input from user.

      Scanner s=new Scanner(System.in);  

      //print message.

      System.out.printf("Enter medium(air,water or steel) : ");

      medium=s.nextLine();  //taking input.

      //print message.

      System.out.printf("Enter the distance that the sound will travel : ");

      distance=s.nextDouble(); //taking input.

      switch(medium) //checking condtion between range.

      {

          case "air":

                  time=distance/1100;         //apply formula

                  break;

          case "water":

                  time=distance/4900;            //apply formula

                  break;

          case "steel":

                  time=distance/16400;            //apply formula

                  break;

          default:

                  System.out.printf("Sorry, you must enter air,water or steel"); //error for invalid input of medium

                  System.exit(0);

      }

      System.out.printf("It take "+time+" seconds"); //print final answer.

  }

}

Output:

Enter medium(air,water or steel) : air

Enter the distance that the sound will travel : 200

It take 0.18181818181818182 seconds

Explanation:

In this program first, we import packages for user input. Then we declare the class in the class we declare all the variables and then we create the scanner class object. It is used for taking input from the user. Then we use the switch statement It is used for condition. It works between the ranges. In the switch statement, we apply all the formula that is given in the question. and at the last, we print the output using printf function in java.