Curious in Science

 Which property of liquid supports its use in hydraulic machines? Answer: Liquids are almost incompressible and transmit pressure equally in all directions (Pascal's Law).

 Which property of liquid is applicable in the water supply system in cities? Answer: The property that liquid finds its own level (liquid pressure depends on height/depth, allowing water to flow from higher heads to lower levels).

  Define the standard atmospheric pressure. Also write its value. Definition: Standard atmospheric pressure is the pressure exerted by the atmosphere at sea level. It is equal to the pressure exerted by a 760 mm high column of mercury. Value: 1.013 *10^5 Pascal or 760 mm of Hg.

 What is the unit of compressed air? Answer: Like any gas pressure, it is measured in Pascal (Pa), bar, or pounds per square inch (psi).

 Which instrument is used to measure atmospheric pressure? Answer: Barometer (e.g., Simple Mercury Barometer, Aneroid Barometer).

 What is the value of standard atmospheric pressure? Value: 1.013 * 10^5  Pascal which is equal to 760 mm of Hg.

 Mention the name of the instrument used to measure the pressure of compressed air. Answer: Pressure gauge (or Bourdon pressure gauge / Manometer).

 Mention any two applications of liquid pressure in our daily life. Water Supply Systems: Water tanks are constructed at a height so that liquid pressure forces water to flow easily down into household taps. Hydraulic Brakes: Automobiles use hydraulic brake systems to stop heavy vehicles efficiently using minimal force.

 Definition: Pressure is defined as the force acting perpendicularly per unit area of a surface. Formula: Pressure (P) = Force \ Area SI Unit: Pascal  or Newton per square meter N/m^2