A mass is initially hanging vertically from a pulley. The s…

A mass is initially hanging vertically from a pulley. The string is attached to a wall on the other side of the table and vibrating in its third harmonic. At a later time, horizontal wind displaces the mass somewhat to the right, and it is observed that the first harmonic has the same frequency as the third harmonic when there is no wind. What is the magnitude of the force

1 public class Circle { 2   private double radius; 3   pri…

1 public class Circle { 2   private double radius; 3   private String name; 4   private static int numOfCircle; 5   Circle(double radius){ 6       this.radius = radius; 7    }  8   9   Circle(double radius, String name){10       this.radius = radius;11       this.name = name; 12    }13.  public static int getNumOfCircle(){ return numOfCircle;}14    public double calculateArea(){15         return (Math.PI * Math.pow(this.radius, 2));16   }17 } Considering the given DDC, which of the following is a valid calling of the getNumOfCircle method in the implementation class ?