The Old Course at St Andrews has hosted the most championships with 29 in total, most recently with the 2015 Open Championship. The championship has only been held outside Scotland and England once, in 1951 when Royal Portrush Golf Club in Northern Ireland was the venue. Turnberry became the most recent course to have hosted the Championship for the first time, when it held the 1977 Open Championship.
has the open ever been played in ireland?
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- yes
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Answer: yes

At present, the euro is legal tender in 19 out of 28 European Union member states, in addition to 5 countries not part of the EU (Monaco, San Marino, Vatican City, Andorra and Montenegro). The Republic of Kosovo also uses the euro, but is only partially recognised as an independent state.
the currency of all eu countries is the euro?
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Answer: no

An especially unusual version of the observer effect occurs in quantum mechanics, as best demonstrated by the double-slit experiment. Physicists have found that even passive observation of quantum phenomena (by changing the test apparatus and passively 'ruling out' all but one possibility), can actually change the measured result. A particularly famous example is the 1998 Weizmann experiment. The ''observer'' in this experiment -- a sophisticated electronic detector -- wasn't human. And yet, possibly because the word ''observer'' implies a person, such findings have led to a popular belief that a conscious mind can directly affect reality. The need for the ''observer'' to be conscious has been rejected by mainstream science as a misconception rooted in a poor understanding of the quantum wave function and the quantum measurement process.
quantum physics tells us that nothing that is observed is unaffected by the observer?
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Answer:
yes