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Behavior of liquids and gases buoyancy
Behavior of liquids and gases buoyancy
Behavior of liquids and gases buoyancy
Behavior of liquids and gases buoyancy
Behavior of liquids and gases buoyancy
Behavior of liquids and gases buoyancy
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Behavior of liquids and gases buoyancy

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  1. Behavior of Liquids and Gases: Archimedes’ principle<br />7SCIENCE Wed. April 13<br />
  2. Review: What are some factors that affect the behavior of liquids and gases?<br />Diffusion- mixing of particles <br />Pressure - Pascal’s principle<br />When pressure is applied to a point in a liquid or gas the pressure will travel unchanged through the liquid or gas<br />
  3. Density and Archimedes’ principle<br />Every substance (solid, liquid or gas) has a density<br />Density refers to if particles in a substance are closely packed together<br /> Density (g/mL)= mass (g)<br /> volume (mL)<br />Higher density = particles are packed more closely Lower density = particles are further apart<br />
  4. Density and Archimedes’ principle<br />Why do some objects float and others sink?<br />If an object has a density lower than that of the surrounding liquid or gas, it will float<br />OPPOSITE: If an object has a density higher than that of the liquid or gas, it will sink<br />
  5. Buoyancy and Archimedes’ principle<br />The idea of buoyancy is that objects tend to float or sink in a liquid<br />Buoyancy is a decrease in weight caused by an upward force in a liquid or gas<br />- Objects have a specific buoyancy<br />Ex: floating in a swimming pool or lake <br />Archimedes’ principle states:<br />An object will sink until the volume of liquid displaced equals the weight of the object (then it will float)<br />
  6. Application of Archimedes’ principle<br />“Plimsoll line”<br /><ul><li>Line painted on the side of a ship or boat
  7. If the boat is sitting low and the line is under the water, the ship is overloaded (too heavy)</li>

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