Practicing Self-Care. 1  1. Take care of yourself. There are many small steps to this one action. 2  2. Put care into your appearance. You don't have to look like Brad Pitt to start building your self confidence. 3  3. Exercise regularly. Part of taking care of yourself is getting exercise.  4. Sleep well.
Stationary Waves. Stationary or standing waves are formed in a medium when two waves having equal amplitude and frequency moving in opposite directions along the same line, interfere in a confined space. Generally, such waves are formed by the superposition of a forward wave and the reflected wave. Both longitudinal and transverse types of waves can form a stationary wave. When reflection occurs at a free end, there is no reversal of phase. i.e., a crest returns as a crest and a trough as a trough.
Since a standing wave is not technically a wave, an antinode is not technically a point on a wave. The nodes and antinodes are merely unique points on the medium that make up the wave pattern. A physics instructor demonstrates and explains the formation of a longitudinal standing wave in a spring.