Chapter 2 Exercise 10, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

(Science: calculating energy) Write a program that calculates the energy needed to heat water from an initial temperature to a final temperature. Your program should prompt the user to enter the amount of water in kilograms and the initial and final temperatures of the water. The formula to compute the energy is Q = M * (finalTemperature – initialTemperature) * 4184 where M is the weight of water in kilograms, temperatures are in degrees Celsius, and energy Q is measured in joules

import java.util.Scanner;
 
public class ProgrammingEx2_10 {
 
 public static void main(String[] args) {
 
  Scanner input = new Scanner(System.in);
 
  System.out.print("Enter the amount of water in kilograms:");
  double M = input.nextDouble();
  System.out.print("Enter the initial temperature:");
  double initialTemperature = input.nextDouble();
  System.out.print("Enter the final temperature:");
  double finalTemperature = input.nextDouble();
 
  double Q = M * (finalTemperature - initialTemperature) * 4184;
  System.out.print("The energy needed is " + Q);
 
 }
}