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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. 2. How aggressive they are No metallic crockery has to be placed inside the microwave just like by mistake they get heated up, they're able to find a fire. Some people even make an effort to dry clothes in microwave, that is a very dangerous act. Sometimes you will find there's possibility of placing the toaster close to the curtains. This is also very risky. Free flowing curtains can be a bad idea with the food prep. The toaster should also be cleaned regularly. It is clear that these two perspectives are going to draw swords against the other frequently. Although most people agree that efficient financial markets are best for everyone, the steps that government have to take to have there often run counter for the microeconomic interests of business. Sometimes a merger should be blocked to foster competition. Sometimes disclosures must be legislated to ensure consumers will make informed decisions. And sometimes certain activities should be regulated or prohibited to ensure that some are certainly not financially harmed by others.