Posted by Deutz Lover on March 11, 2022 at 09:31:06 from (66.172.80.74):
In Reply to: Fertilizer problem? posted by larry@stinescorner on March 11, 2022 at 04:24:02:
Over half of the helium reserves are located in the US. The rest is spread over Russia, Qatar, Australia, Poland, and Algeria. Since it is a noble gas it cannot be created de novo in a lab by reducing some compound. Kansas wells were one of the early sources. There are about 16 extraction plants in the U.S. Helium is normally found in varying amounts in natural gas and is produced as part of the purification process. It is believed that the helium in the wells is the product of radioactive decay. Some exists from earlier times.
Remember that helium is the first reaction product of nuclear fusion that drives the furnace of the sun. Once the hydrogen is used up other elements are produced from further fusion making heavier and heavier elements until iron is produced and that marks the beginning of the end for a star. Even heavier elements are produced when a star goes super nova. We are star dust.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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