New Edition. The language of the entire book has been revised to make the text impressive and engaging. Some solved examples and exercise problems using the shock theory, which would be of value to the students not only for their courses but also to their success in competitive examinations, are added. A list of exercise problems with answers added to Chapter 16 will be of value to students to be successful in their course. The chapter on the 'Power of Compressible Bernoulli Equation' is enhanced with some involved solved examples and a list of exercise problems. Also, the text has been revised throughout the book, wherever necessary.