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P WAVES:

Speed: 3.7 miles per secondType of motion: Lateral motion, move back and forth, in the direction of travel.Material: Solid, liquid and GasOther Information: the fastest of all the three and cause just a slight vibration.

S WAVES:

Speed: 2.1 miles per secondType of motion: Transverse in nature, move in crisscross motion that is perpendicular to the direction of travel.Material: Only solidsOther information: The second fastest and cause more damage than P waves.

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Italian workers migrated to northern provinces

May consider a group  g=({0,1},+)g=({0,1},+)where  ++  will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are  called  ‘00’ and ‘11’ and  may not mean  zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself.  for a set  ss  in  g′g′  having more elements than just  {0,1}{0,1}  the values for  a+b∈sa+b∈s, such that  a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of  1+11+1. the answer could possibly have been  22  if oanswer is25,000