Question
15. Sound travels through air as a result of collisions between the molecules in the air. The temperature of the air affects the speed of the molecules,which in turn affects the speed of sound. The velocity of sound in dry air can be approximated by the formula:
velocity _ 331.3 _ 0.61 _ Tc
Where Tc is the temperature of the air in degrees Celsius and the velocity is in meters/second.
Write a program that allows the user to input a starting and an ending temperature. Within this temperature range, the program should output the temperature and the corresponding velocity in one-degree increments.
For example, if the user entered 0 as the start temperature and 2 as the end temperature then the program should output:
Answer
Program:
// main.cpp
#include <iostream>
using namespace std;
int main()
{
double start;
double end;
double velocity;
cout << "Enter the starting temperature: ";
cin >> start;
cout << "Enter the ending temperature: ";
cin >> end;
while(start <= end)
{
velocity = 331.3 + 0.61 * start;
cout << "At " << start
<< " degrees Celsius the velocity of sound is "
<< velocity << " m/s" << endl;
start++;
}
return 0;
}
Output:
Enter the starting temperature: 0
Enter the ending temperature: 2
At 0 degrees Celsius the velocity of sound is 331.3 m/s
At 1 degrees Celsius the velocity of sound is 331.91 m/s
At 2 degrees Celsius the velocity of sound is 332.52 m/s