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cover picture

snow -makers

A.
In the early to mid twentieth century  , with the growing popularity of skiing ,ski slopes become extremely profitable businesses. but ski resort  owners were completely dependent on the weather; if it didn`t snow ,or didn`t snow enough,they had to close evryting down .fortunately  ,a device colled the snow gun can now provide snow whenever it is needed .


These days such machines are standard equepment in the vast mejority of ski resorts around the world ,making it possible  for many resort to stay open four months or more a year.

B.
snow formed by netural weather systems comes from water vapour in the atmosphere .The weather vapour condenses into droplets freeze into tiny ice crystals .
 more weather particles  thene condens onto the crystal join with it to form a snowflake .As the snowflake grows heavier ,it falls towords the  earth  .

C.



The snow gun work very differently from a natural weather system , but it accomplishes  exactly the same thing . The  device  basically works by combining  water and air .Two different hoses are attached to the gun ,one leading from a water pumping station whiche pumps water up from a lake or reservoir ,and the other leading from an air compressor .





When the compressed air passes through the hose into the gun ,it atomises  the water that is it disrups the stream so that the water splits up into tiny droplets .The droplets are then blown out of the gun and if the outside temperature is below 0 digree c,  ice crystals will form ,and will then make snowflakes in the same way as natural snow .

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