Specific Gravity


  • Specific gravity is the ratio of a weight of volume of material to the same weight of volume of water.
  • We calculate specific gravity to know the behavior of the material in water.
  • Every material has its own specific gravity & it usually ranges between 0.1 to 100.
  • If the specific gravity of material is less than 1, then that material floats in water (because specific gravity of water is 1). 
  • Kerosene floats on water because specific gravity of kerosene is 0.79 g/cm3 which is less than specific gravity of water.
  • If the specific gravity of material more than 1,then it sinks in water.
  • Cement sinks in water, because specific gravity of cement is 3.1-3.16 g/cm3 which is more than the specific gravity of water.
  • Specific Gravity of common materials as follows
  1. Air (dry)                   = 0.0013
  2. Aluminum               = 2.70
  3. Asphalt crushe        = 0.72
  4. Brick, common red = 1.92
  5. Brick, fire clay          = 2.4
  6. Brick, silica                = 2.05
  7. Brass                           = 8.40                      
  8. Bronze                        = 7.40-8.90
  9. Carbon monoxide    = 0.0019
  10. Cast iron                     = 7.10
  11. Cellulose                     = 1.50
  12. Cement, Portland      = 3.15
  13. Cement, mortar         = 2.16
  14. Cement, slurry           = 1.44
  15. Clay                              = 1.75
  16. Coal, bituminous       = 1.35
  17. Concrete, gravel        = 2.4
  18. Copper                         = 8.69
  19. Diamond                     = 3.51
  20. Diesel oil                     = 0.8-0.85
  21. Earth                            = 2
  22. Epoxy resin                = 1.20
  23. Ethyl Alcohol             = 0.81
  24. Gasoline                      = 0.7-0.76
  25. Glass                            = 2.4-2.7
  26. Granite                        = 2.69
  27. Granite, broken         = 1.65
  28. Gravel                          = 1.52
  29. Gold                              = 19.3
  30. Grease                          = 0.92-0.94
  31. Hydrogen                    = 0.0009
  32. Ice                                 = 0.9
  33. Lead                              = 11.34
  34. Marble                          = 2.56
  35. Mercury                       = 13.6
  36. Mineral oil                   = 0.85-0.95
  37. Oxygen                         = 0.0015
  38. Paper                            = 0.7-1.10
  39. Platinum                      = 21.45
  40. Polyamide                   = 1.04-1.5
  41. Polypropylene            = 0.91
  42. Polystyrene                 = 0.94-1.0
  43. PVC                               = 0.96-0.98
  44. Rubber                         = 1.7-2.20
  45. Silver                            = 10.5
  46. Steel                              = 7.85
  47. Sulphuric acid            = 1.83
  48. Tin                                 = 7.28
  49. Water                            = 1.0
  50. Zinc                                = 7.14


Comments

Post a Comment

Popular Posts