CodingForums.com - Help with Scientific Notation in Java

Hi, I am a college freshman and I am taking my very first Java programming class. I have never programmed before, so I am having a little bit of trouble. For our second lab, we are to put numbers into scientific notation using the mod (%) and printf operator. I am having trouble doing this, so could some body help me figue out what I need to do? Here is a copy of my code:

Code:

 import java.util.Scanner;



public class UniversalGravitation {



        /**

         * @param args

         */

        public static void main(String[] args) {

                // TODO Auto-generated method stub

                                

                double m1;

                double m2;

                double r;

                double a1;

                double a2;

                final double G = 6.67384e-11;

                                

                Scanner keyboard =  new Scanner(System.in);

                

                                

                System.out.print("Enter the mass of the first object (in kilograms) ");

                m1 = keyboard.nextDouble();

                System.out.print("Enter the mass of the second object (in kilograms) ");

                m2 = keyboard.nextDouble();

                System.out.print("Enter the dsitance (in meters) between them ");

                r = keyboard.nextDouble();

                

                

                double F = G * ((m1*m2)/Math.pow(r, 2));

                a1 = F/m1;

                a2 = F/m2;

                

                System.out.printf("Mass of first object: \t\t" + m1 + "kg");

                System.out.println("Mass of second object: \t\t" +  m2 + " kg");

                System.out.println("Distance: \t\t\t" + r + " m");

                System.out.println("Force: \t\t\t\t" + F + "N");

                System.out.println("Acc. of first object: \t\t" + a1 + "m/s^2");

                System.out.println("Acc. of second object: \t\t" + a2 + " m/s^2");

        

        }



}