force and pressure

• Atmospheric pressure refers to the weight of air pressing down on Earth's surface and can be measured using a barometer.
• The magnitude of pressure at any point in a liquid depends on the depth of the fluid column at that point.
• Pressure applied to an enclosed fluid is transmitted equally in all directions.
• Atmospheric pressure decreases with increasing altitude due to less atmospheric density.
• Pressure increases with depth in liquids because the weight of the liquid exerts more force on objects submerged deeper into it.
• The average atmospheric pressure at sea level is approximately 1.013 x 10^5 Pa or 760 mmHg (millimeters of mercury).