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Forces in Fluid
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Gravity
Terms in this set (23)
density formula
d=m/v
if a fish has a volume of 1000 cubic centimeters, what is the volume of the water it displaces when it is submerged?
1000cm3
the weight of the submerged fish is a a downward force. what force acts in a direction opposite to the weight of a fish?
positive buoyant force
what happens when the weight of a submerged object is greater than the buoyant force on the object?
the object sinks to the bottom
three objects in the ocean have the same weight. why does one of them sink?
the volumes are different and the shape of the block is smaller
how can you find the volume of an apple
measure how much water it displaces when submerged
before it breaks into eight pieces, the large cubic rock has a density of 2.5g/cm3. what is the density of each of the eight small pieces?
2.5g/cm3
if a cube of unknown material has a mass of 40g and a length of 2 cm along each edge, what is the density in grams per cubic centimeter?
5g/cm3
two blocks have the same volume. which one has the greater density?
the one with the more mass
why does a small block of steel and a large block of steel have the same density, even though one block is bigger than the other?
even if one block has more volume, it will also have more mass. the large block will still have the same ratio of mass to volume.
would 120 mL of the same liquid have a higher density?
no, same substance same ratio
an object has a density of .95g/cm3. what liquid will the object fall in?
corn oil
why will a rubber washer sink in a bucket of water?
it has a higher density
why do different liquids float on top of each other?
liquids line up from least density to highest density ( at the bottom)
how can you determine if an object will float or sink?
find the objects density, the find the liquids density, and then compare
why does a helium balloon rise when a balloon does not?
helium is less dense than air
what kind of force does water exert on a submerged object?
buoyant
how much fluid does a submerged object displace?
the volume of the object
archimedes' principle
buoyant force acting on a submerged object is equal to the weight of the volume of fluid displaced by the object
what happens when the weight of a submerged object is exactly equal to the buoyant force?
it is neutrally buoyant
a stone will sink in water if its density is _____________ than the density of the water
more/greater
according to archimedes' principle, if an object floats, the volume of displaced water is equal to the volume of the portion of the object ______ water
under
how would you find the volume of this irregular shaped object?
you can put it in a graduated cylinder and find out how much water the object displaced.
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