The Physics 2 Tutor: Learning by Example DVD series covers thermodynamics, oscillations & waves in physics through step-by-step example problems. Emphasis is placed on giving students confidence in their skills by gradual repetition so that the skills learned are committed to long term memory. Lessons cover sound intensity and sound level, including how sound waves carry energy and how it is sometimes convenient to discuss the energy carried by a wave in terms of its sound intensity or sound level. Grades 9-12. 33 minutes on DVD.