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Homework 1.9 Buoyancy Review
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Why can objects float in water?
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they are not affected by the gravitational force
there is a force, buoyancy, which acts upwards
they are repelled by water
they have no mass
What is the "displaced water"?
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the water beneath a floating object
the water an object has moved out of the way
the water above a sunken object
the water absorbed by an object
What is the buoyant force equal to?
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the weight of the displaced water (fluid)
the mass of the displaced water (fluid)
the weight of the water (fluid) beneath a floating object
the weight of the air inside of a hollow object
What happens when an object is less dense than water?
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the object will sink since there will be a large buoyant force
the object will float since there will be a small buoyant force
the object will float since there will be a large buoyant force
the object will sink since there will be a small buoyant force
Why is it easy for people to float in the Dead Sea?
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its high salt content means it has a LOW density
its high salt content means it is VERY dense
its low salt content means it has a LOW density
its low salt content means it is VERY dense
Mixed density is when more than one substance makes up the volume of an object. An example of this is a hollow steel box. What substances make up the volume of a hollow steel box?
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gravity and buoyancy
air and steel
water, air and steel
steel and water pressure
Why do heavy metal ships float?
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the ship and the air in the hull combined are MORE DENSE than water
they are hollow and all hollow objects float
they displace a small amount of water
the ship and the air in the hull combined are less dense than water
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