Find the density of an object if its mass is 8000 kg and volume is 1000 m3.
1 Answer
Solution
Mass (m) = 8000 kg,
Volume (v) = 1000 m3 ,
Density, \(d=\frac mv\),
Or, \(d=\frac{8000}{1000})
∴ d = 8 mg/m3
Hence, the density of an object is 8 kg/m^3.
Things to remember from Pressure
- The force acting perpendicularly on per unit surface area is called pressure. Its SI unit is N/m2 or Pascal.
- The pressure exerted by the atmosphere is called atmospheric pressure.
- The normal atmospheric pressure i.e. atmospheric pressure at the sea level is 760 mm of Hg.
- Air has weight and it can be easily be compressed.
- Air occupies space.
- Atmospheric pressure decreases with the increase in altitude.
- The pressure exerted by the liquid is called the liquid pressure.
- Liquid exerts pressure at the bottom of the vessel as well as on the sides of the vessel in which it is kept.
- Liquid pressure increases with the increase in depth.
- Liquid exerts pressure equally in all directions.
- When the pressure is applied to an enclosed liquid, then it transmits pressure equally in all directions. This is called Pascal's law.
- Liquid pressure increases with the increase in the density of the liquids.
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