Physics is frequently one of the hardest subjects for students to tackle because it is a combination of two of the toughest subjects for most students - Math and Word Problems. The Physics 2 Tutor focuses on Thermodynamics, Oscillations and Waves. The easiest way to learn Physics is for students to work problems as they learn the material and that is exactly what this series teaches. Students will immediately improve their problem-solving skills and have a reference for many of the commonly asked problems in Physics. The Physics 2 Tutor is a complete 27 lesson series covering all of the core topics in detail. What sets this series apart from other teaching tools is that the concepts are taught entirely through step-by-step example problems of increasing difficulty. It works by introducing each new concept in an easy to understand way and using example problems that are worked out step-by-step and line-by-line to completion. If a student has a problem with coursework or homework, simply find a similar problem fully worked on in the series and review for the steps needed to solve the problem. Students will be able to work problems with ease, improve their problem-solving skills and understand the underlying concepts of Physics. This program covers the important topic of Doppler shift in Physics. We begin by discussing how the frequency of a sound wave can be heard differently by various observers depending on if the source or listener is moving relative to one another. The entire lesson is taught by working example problems beginning with the easier ones and gradually progressing to the harder problems. Emphasis is placed on giving students confidence in their skills by gradual repetition so that the skills learned in this section are committed to long term memory.