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20% of the total volume of a wood is above the surface.
Explain the term specific gravity?
- Specific gravity, also referred to as relative density, is a measurement of a substance's density in relation to water's density.
- The specific gravity may be calculated by dividing the substance's weight in grams by its volume in cc.
An individual block of wood has a specific gravity of 0.80.
- The ratio of the a material's density compared to that of a standard substance is its specific gravity, sometimes referred to as relative density.
- The term "buoyancy" refers to the upward force a fluid applies to a submerged item in a gravitational field.
- When an object is submerged in a fluid, the pressure applied to its bottom surface is greater than the pressure applied to its top surface because pressure in fluids increases with depth.
Thus, 20% of the total volume of a wood is above the surface.
To know more about the specific gravity, here
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