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Floating and Sinking Section 6.3
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MORE dense in than water
Rules for Density Denser objects sink Less Dense objects float Objects of the same density will be suspended Fish Food LESS Dense then water FLOATS on top Fish SAME density as water FLOATS in the center Plants and Rocks MORE dense in than water SINKS
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Rearrange the equation…
Calculating Density What is an object’s density if it has a mass of 15g and a volume of 2.5mL? D = m / V D: density (g/mL) m: mass (g) V: volume (mL) Rearrange the equation… V = m / D m = V x D
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TRY IT! Do the density worksheet for homework!!!
Paste it in your notebook as your output!
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Buoyancy How do ships float if they are made of metal?
Buoyant Force – acts in the upward direction, against the force of gravity to make something seem lighter Hollow objects that are full of air are very buoyant because they have a large surface area and gases are less dense then air
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Archimedes’ Principle
-Archimedes Principle – the buoyant force on an object is equal to the weight of the fluid displaced by the object
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