21. Finally, using the phase change , the interference between the two waves can be calculated. 22. In the soak segment of the profile, the solder paste approaches a phase change . 23. The term " phase change thermosiphon " is a misnomer and should be avoided. 24. The amount of energy required for a phase change is known as latent heat. 25. A specific example is the rate of phase changes . 26. The effect of the lens is to introduce a non-uniform phase change that causes focusing. 27. Tape head misalignment ( azimuth ) also will cause a phase change in upper frequencies. 28. :A phase change doesn't preserve a network solid's characteristics. 29. Both concern processes in which critical phase changes promote adaptation and organization within a system. 30. Phase change thermal batteries can be thought of as tools to be applied to applications.