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The study of geology also encompasses Earth processes which can affect overall civilization. An earthquake can destroy a large number of lives in a few minutes. Also, tsunamis, floods, landslides, droughts, and volcanic activity may have an enormous influence on civilization. Geologists study those processes and can recommend action plans to minimize damage in the event that such events will occur. For example, by studying flood patterns of rivers, geologists can recommend areas to stop when building new cities,towns, and residential neighborhoods in order to prevent future damage. Earthquake science, although a very difficult division of study, might help minimize problems for life and civilization by estimating where earthquakes are likely to occur (referred to as fault lines) also to recommend the technology to use within the construction of buildings over these vulnerable areas. 9. Their emotional appeal You have a flare for beauty. You love making people feel pampered and relaxed through beauty and spa treatments. Opening a spa business is the ideal however you do not know how to begin. You have your concept available. You know what services you are likely to offer. You even know that you wish to open your spa business. Next to contact breaker, spark plug is among the most weakest part of the ignition system. It is mounted within the combustion chamber from the engine, where working conditions are- severe. During peak combustion conditions the temperature inside the combustion chamber in the modern car engine may be around 2500 ºC and the pressure about 7 Mpa. Moreover a spark plug can also be exposed to thermal and load cycling fatigue on account of sudden changes in temperature and pressure-from the high temperature of burnt gas on the relatively low temperature with the air/fuel mixture and from the ruthless during the time of explosion from the air/fuel mixture to low pressure during induction. In addition, the spark plug needs to endure high voltage, mechanical vibration along with the corrosive atmosphere of combustion gages. A modern spark plug posseses an economical life of about 10,000-16,000 km.