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### Hydrostatics Videos & Notes

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8 Videos & Notes
• Exam Solutions
Leaving Cert Applied Mathematics by Dominick Donnelly
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• KeysToMaths: Density, Buoyancy and Apparent Weight
The ratio, (density of a floating object) : (density of liquid) equals the fraction of the floating object by volume that is immersed in the liquid. Newton's Second and Third laws are used to explain how a spring balance works. The (true) weight W of an object is the force of gravity on the object and thus is constant. The apparent weight (reading on balance) of an object immersed in a liquid is W - B where B is the buoyancy of the object. Check out KeysToMaths1 for more tutorials and solutions: https://www.youtube.com/channel/UCOYoe9L9R13HGUIhszjkeug
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• KeysToMaths: Hydrostatics Examples (2013 2012 OL)
Worked solutions to hydrostatics questions as seen on ordinary level papers 2012-2013. Check out KeysToMaths1 for more tutorials and solutions: https://www.youtube.com/channel/UCOYoe9L9R13HGUIhszjkeug
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• KeysToMaths: Law of Flotation
The Law of Flotation says that for a floating object, the weight of the object equals the weight of the liquid displaced by the object. We prove this by using Archimedes' Principle with Newton's Second law applied to an object in equilibrium (floating). Check out KeysToMaths1 for more tutorials and solutions: https://www.youtube.com/channel/UCOYoe9L9R13HGUIhszjkeug
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• KeysToMaths: Proof of Archimedes' Principle
The buoyant force B on an object immersed in a liquid is the (contact) force of the liquid on the object. Archimedes' Principle says that the buoyant force (upthrust) on an object immersed in a liquid is equal to the weight of the liquid displaced by the object. Check out KeysToMaths1 for more tutorials and solutions: https://www.youtube.com/channel/UCOYoe9L9R13HGUIhszjkeug
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• KeysToMaths: Pressure at a Point in a Liquid
We show that the pressure at a point at depth h in a static liquid is pgh where p (rho) is the density of the liquid. We state (without proof) that the pressure is pgh even if the point is not directly below the surface of the liquid as in the case of a container with non - vertical sides. We also state (without proof) that the force at any point in a static liquid has the same magnitude in all directions. Check out KeysToMaths1 for more tutorials and solutions: https://www.youtube.com/channel/UCOYoe9L9R13HGUIhszjkeug
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• KeysToMaths: Pressure
The pressure on a surface is the amount of force per unit area acting at right angles to a surface. Pressure is a scalar quantity. Check out KeysToMaths1 for more tutorials and solutions: https://www.youtube.com/channel/UCOYoe9L9R13HGUIhszjkeug
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• thephysicsteacher.ie
notes and questions available
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