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2. Spark plug - Wikipedia

   en.wikipedia.org/wiki/Spark_plug

   Spark plug with single side electrode An electric spark on the spark plug. A spark plug (sometimes, in British English, a sparking plug, [1] and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within ...

3. Wasted spark system - Wikipedia

   en.wikipedia.org/wiki/Wasted_spark_system

   A wasted spark system is a type of ignition system used in some four-stroke cycle internal combustion engines. In a wasted spark system, the spark plugs fire in pairs, with one plug in a cylinder on its compression stroke and the other plug in a cylinder on its exhaust stroke. The extra spark during the exhaust stroke has no effect and is thus ...

4. Iridium - Wikipedia

   en.wikipedia.org/wiki/Iridium

   The dominant uses of iridium are the metal itself and its alloys, as in high-performance spark plugs, crucibles for recrystallization of semiconductors at high temperatures, and electrodes for the production of chlorine in the chloralkali process. Important compounds of iridium are chlorides and iodides in industrial catalysis.

5. International Prototype of the Kilogram - Wikipedia

   en.wikipedia.org/wiki/International_prototype_of...

   The addition of 10% iridium improved upon the all-platinum Kilogramme des Archives by greatly increasing hardness while still retaining platinum's many virtues: extreme resistance to oxidation, extremely high density (almost twice as dense as lead and more than 21 times as dense as water), satisfactory electrical and thermal conductivities, and ...

6. Group 9 element - Wikipedia

   en.wikipedia.org/wiki/Group_9_element

   Iridium is mainly used as a hardening agent for platinum alloys. Iridium is the most corrosion-resistant metal known as it is not attacked by acids, including aqua regia. In the presence of oxygen, it reacts with cyanide salts. Traditional oxidants also react, including the halogens and oxygen at higher temperatures.

7. KFC Has an All-New $5 Bowl—Plus, 3 Returning Fan Favorites

   www.aol.com/kfc-5-bowl-plus-3-200000281.html

   KFC is known for its crispy fried chicken made with 11 herbs and spices—but that’s not all the fast food chain has to offer. Over the last year, it has gone above and beyond, expanding the ...