Pressure in liquids

• An object immersed in a liquid experiences an upward force exerted by the liquid.
• This force decides whether the object will float or sink. If the upward force exceeds the weight of the object, the object floats; if the weight of the object exceeds the upward force, the object sinks.
• The instrument used to measure pressure is pressure gauge or open manometer tube.

Variation of Liquid pressure with depth:

• Pressure increases with the increase in depth.
• Deep in the sea pressure exerted by the water is very high. To protect themselves from such high pressure deep-sea divers wear specially designed diving suits.