Open reach look after the cables from the exchange to the house. BT and the other licenced operators run the exchanges and the links between them.
32 posts • joined 8 Feb 2011
Dictionary definition of Half Life: The time required for half the nuclei in a sample of a specific isotopic species to undergo radioactive decay.
basically, within that time period half of the radioactive isotope has decayed into the next element in that particular chain, leaving half behind.
so after those "hours " are up, there will still be some left to be found, Thats why the iodine with a half life of 8 days will take weeks to decay, not just 1 week and a day.
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