Waves have two main phases: the crest, which is the highest point of the wave, and the trough, which is the lowest point of the wave. The propagation velocity of a wave is the speed at which the wave travels through a medium. This velocity can be affected by the properties of the medium, such as its density and elasticity. In general, waves with higher frequencies and shorter wavelengths tend to have higher propagation velocities. **

Radio waves can travel long distances, depending on various factors such as frequency, power, and atmospheric conditions. Generally, lower frequency radio waves can travel farther than higher frequency waves. Under ideal conditions, radio waves can travel thousands of miles, which is why they are used for long-distance communication such as AM radio broadcasts and shortwave radio. However, obstacles such as buildings and mountains can limit the range of radio waves. **

Planetary phases refer to the different appearances of a planet as seen from Earth as it orbits the Sun. These phases are caused by the changing relative positions of the Sun, the planet, and the Earth. For example, Venus and Mercury exhibit phases similar to the Moon, with crescent, gibbous, and full phases. The inner planets, Mercury and Venus, can exhibit all phases, while the outer planets, such as Mars, Jupiter, and Saturn, exhibit only crescent and gibbous phases. **

Anorectic phases refer to periods of time during which an individual experiences a loss of appetite or a decreased desire to eat. These phases can be associated with various medical conditions, such as depression, anxiety, or certain eating disorders. During anorectic phases, individuals may have difficulty maintaining a healthy weight and may experience physical and emotional symptoms related to malnutrition. It is important for individuals experiencing anorectic phases to seek medical and psychological support to address the underlying causes and to ensure proper nutrition and overall well-being. **

It is unclear what specific phases are being referred to in this question. If the question is asking whether two different stages or periods have clashed or come into conflict, then it would depend on the context in which the question is being asked. If the question is referring to scientific or technical phases, then more information would be needed to provide a specific answer. **

Horny phases refer to periods of increased sexual desire or arousal. These phases can be influenced by hormonal changes, emotional factors, or environmental stimuli. During a horny phase, individuals may experience heightened sexual thoughts, fantasies, and physical sensations. It is a natural and normal part of human sexuality, and can vary in intensity and duration from person to person. **

Phases end when the specific goals or objectives associated with that phase have been achieved. This could be when a project milestone has been reached, a certain deliverable has been completed, or a specific set of tasks has been accomplished. It is important to clearly define the criteria for ending a phase in order to ensure that the project progresses smoothly and that resources are allocated effectively. Once the goals of a phase have been met, the project can then move on to the next phase. **

The system with the travel tickets works by allowing users to purchase tickets for their desired mode of transportation, such as trains, buses, or planes, either online or at designated ticket counters. These tickets typically have a specific date, time, and seat assignment, depending on the mode of transportation. Once the ticket is purchased, it is either printed out or stored electronically on a mobile device for easy access during the journey. Travelers must present their tickets at the designated boarding area to gain entry and board their transportation. **