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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. 4. The number of arguments they make FACTS: Shoeless Joe batted over .300 in all of his 11 full major league seasons. His .356 lifetime batting average is third-highest in major league baseball history. In 1911 he hit a fantastic .408 of what was essentially his rookie season, setting a rookie record that still stands greater than a hundred years later. Ironically, Ty Cobb hit .420 that season, denying Joe the league batting title. Despite his .356 lifetime average, Jackson never won a league batting crown. On April 20, 1912, Joe scored the initial run in Tiger Stadium history. Jackson won his only World Series championship using the White Sox in 1917. Specific symptoms vary by type of anxiety disorder, but typically, anxiety disorders are defined by: