Strenght of materials

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Across
  1. 1. The propelant of the fire
  2. 7. Represented by h=0 in static
  3. 9. His unite is N/m^3
  4. 10. Exercice of musculation
  5. 11. It's an action in the time
  6. 14. Contrary of stiffness
  7. 17. When you punch somebody on a focalised point
  8. 18. When the shape of a material changes
  9. 19. Link with 3 degrees of freedom
  10. 20. In chimical, his atomical number is 13
  11. 21. When the pression increases
Down
  1. 2. Represented by equation of movement
  2. 3. Mix of several metals
  3. 4. All men dreads it
  4. 5. Contrary of extension
  5. 6. Part of a frame
  6. 8. Synonym surface
  7. 12. Can also be drunk in bottle
  8. 13. Synonyme of obligation
  9. 15. A man in Avengers
  10. 16. The base of a house