Cross Word Puzzle

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Across
  1. 2. instrument used for measuring an electric current
  2. 3. a liquid by heating it so that it vaporises & then condenses the vapour
  3. 4. average value of a set of quantities
  4. 7. ability to do work
  5. 8. of the two equal parts
  6. 10. quantity of matter a body contains
Down
  1. 1. first letter of greek alphabet
  2. 2. of a triangle
  3. 3. longest chord of a circle
  4. 5. sub-atomic particle of about as same as a proton but without an electric charge
  5. 6. smallest particle of a chemical element
  6. 9. device that resist the passage of an electric current