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Text File  |  1999-02-05  |  422b  |  15 lines
  1.  
  2.     Airship mystery is solved after 60 years
  3.  
  4. 1.    Why is the name airship scientifically mis-leading?
  5.    
  6. 2.    a) Which safer gas is now usually used in airships?
  7.        b) What are the disadvantages of using this gas?
  8.  
  9. 3.    Which substances are produced when
  10.     a) Aluminium powder and b) Hydrogen burn
  11.     c) Write equations for these reactions.
  12.  
  13. 4.    What was responsible for the electric spark that caused the disaster?
  14.  
  15.