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  • Pressure (article) | Liquid Barometer | Khan Academy
    The pressure exerted on your body by the weight of the atmosphere is surprisingly large The reason you don't notice it is because the atmospheric pressure is always there We only notice a change in pressure above or below normal atmospheric pressure (like when we fly in an airplane or go underwater in a pool)
  • Fluids | AP®︎ College Physics 1 | Science | Khan Academy
    Investigate the properties of fluids and the ideal fluid model Describe density as the ratio of mass to volume Explore the concept of pressure and learn how to calculate the pressure exerted by a fluid Distinguish between absolute and gauge pressure, and understand why pressure increases with depth in an incompressible fluid
  • Buoyant force (video) | Fluids | Khan Academy
    The buoyant force is a net upward force exerted on an object by a fluid The buoyant force results from the increase in fluid pressure with depth The magnitude of the buoyant force exerted on an object by a fluid is equal to the weight of fluid displaced by the object (ρVg)
  • Pressure (article) | Liquid Barometer | Khan Academy
    Course: Cambridge O Level Physics (CIE) > Unit 7 Lesson 3: Liquid Barometer Pressure and the simple mercury barometer Finding height of fluid in a barometer Pressure Science>
  • Pressure (article) | Density and pressure | Khan Academy
    A solid surface can exert pressure, but fluids (i e liquids or gases) can also exert pressure This might seem strange if you think about it because it's hard to imagine hammering in a nail with liquid To make sense of this, imagine being submerged to some depth in water The water above you would be pushing down on you because of the force of gravity and would therefore be exerting pressure
  • Fluid pressure (video) | Pressure in Liquids | Khan Academy
    Pressure is the magnitude of the perpendicular force component exerted per unit area over a given surface area Pressure is a scalar quantity The pressure exerted by a fluid is the result of the interactions between the fluid’s particles and the surface with which those particles interact The absolute pressure of a fluid at a given point is equal to the sum of a reference pressure, such as
  • Osmosis, osmolarity, and tonicity (article) | Khan Academy
    The ability of a solution to make water move into or out of a cell by osmosis is known as its tonicity Tonicity is a bit different from osmolarity because it takes into account both relative solute concentrations and the cell membrane’s permeability to those solutes
  • What is Pressure? (video) | Pressure | Khan Academy
    Course: MH Grade 8 Science > Unit 3 Lesson 2: Pressure Effect of different force on same contact area Liquid exerts pressure in all the directions Effects of pressure in daily life Effect of depth and density on fluid pressure Air pressure
  • Pressure (article) - Khan Academy
    The pressure exerted on your body by the weight of the atmosphere is surprisingly large The reason you don't notice it is because the atmospheric pressure is always there We only notice a change in pressure above or below normal atmospheric pressure (like when we fly in an airplane or go underwater in a pool)
  • Buoyant force (article) | Khan Academy
    The name of this upward force exerted on objects submerged in fluids is the buoyant force So why do fluids exert an upward buoyant force on submerged objects? It has to do with differences in pressure between the bottom of the submerged object and the top Say someone dropped a can of beans in a pool of water Not again!





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