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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
- Air (dry) = 0.0013
- Aluminum = 2.70
- Asphalt crushe = 0.72
- Brick, common red = 1.92
- Brick, fire clay = 2.4
- Brick, silica = 2.05
- Brass = 8.40
- Bronze = 7.40-8.90
- Carbon monoxide = 0.0019
- Cast iron = 7.10
- Cellulose = 1.50
- Cement, Portland = 3.15
- Cement, mortar = 2.16
- Cement, slurry = 1.44
- Clay = 1.75
- Coal, bituminous = 1.35
- Concrete, gravel = 2.4
- Copper = 8.69
- Diamond = 3.51
- Diesel oil = 0.8-0.85
- Earth = 2
- Epoxy resin = 1.20
- Ethyl Alcohol = 0.81
- Gasoline = 0.7-0.76
- Glass = 2.4-2.7
- Granite = 2.69
- Granite, broken = 1.65
- Gravel = 1.52
- Gold = 19.3
- Grease = 0.92-0.94
- Hydrogen = 0.0009
- Ice = 0.9
- Lead = 11.34
- Marble = 2.56
- Mercury = 13.6
- Mineral oil = 0.85-0.95
- Oxygen = 0.0015
- Paper = 0.7-1.10
- Platinum = 21.45
- Polyamide = 1.04-1.5
- Polypropylene = 0.91
- Polystyrene = 0.94-1.0
- PVC = 0.96-0.98
- Rubber = 1.7-2.20
- Silver = 10.5
- Steel = 7.85
- Sulphuric acid = 1.83
- Tin = 7.28
- Water = 1.0
- Zinc = 7.14
thank u today i know why materials floats N sinks...
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