public class Add { private static String rightJustify( String s , int newLength ) { while( s.length() < newLength ) { s =   + s ; } return s ; } private static void justifyAndPrint( String leadingText , int number , int totalLength ) { // convert the number to text String s =  + number ; System.out.println( leadingText + rightJustify( s , ...
Why Solar Energy? A typical residential solar PV panel system in the U.S. costs $3.60/watt after installation, and the solar panels typically save the customer over $20,000 (net) over the course of 20 years. Learn more about the many advantages of solar energy.
In addition, costs for fossil fuels may creep up due to raw material costs, shipping costs, and possibly carbon dioxide taxes. At an installed price of $1.25 per watt, the cost of PV solar is always cheaper than coal. At $2 per watt, it is cheaper after year 40.At $3.00 per watt, it is cheaper about year 80. It is expected that PV solar costs will reach conventional coal parity by 2017. As a result, no new coal plants are expected to be initiated, although some current coal plants will likely be upgraded.t $2 per watt, it is cheaper after year 40. At $3.00 per watt, it is cheaper about year 80. It is expected that PV solar costs will reach conventional coal parity by 2017. As a result, no new coal plants are expected to be initiated, although some current coal plants will likely be upgraded.