Viscosity
Density
Buoyancy
Fluids
Calculations
100
What is viscosity?
The thickness of a fluid, the measure of how well it will flow.
100
What is its volume?
The amount of space that a object/material uses.
100
What is buoyancy?
The upward force exerted by a fluid.
100
What states of matter are considered fluids?
Liquids and gases
100
What is the density of water?
1g/mL
200
What is low viscosity?
It is when a fluid will flow freely and quickly, a thin fluid like water.
200
Less dense fluids will do this when placed on top of denser fluids.
They will float.
200
What is the relationship ship between buoyant force and gravity?
They are opposing forces, gravity pulling down and buoyant force pushing up.
200
What are the properties of fluids?
They flow and take the shape of their container.
200
What is the density of a rock that has a mass of 550g and a volume of 25cm3?
22g/cm3
300
According to the Particle Model of Matter, what happens to a fluid when the temperature rises?
The particles gain energy and move faster. This weakens the bonds between then and allows them to move more freely, lowering the viscosity.
300
What is the formula for calculating density.
Density = mass(g) / volume(mL or cm3)
300
This type of buoyancy occurs when an object stays suspended in the fluid without rising or sinking.
Neutral buoyancy
300
This property describes how easily a fluid flows, and is one of the major ways fluids are compared.
Viscosity
300
If a ship weighs 83 743kg and it displaces 79 326kg of water, is it positvely, neutrally, or negatively buoyant?
Negatively buoyant
400
What is flow rate?
The measurement of the distance travelled by a fluid in a certain amount of time—is used as an indicator of viscosity.
400
Using the particle model of matter, explain why a substance is more dense.
There are more particles packed into the same amount of space.
400
When the weight of an object is less than the weight of the fluid it displaces, this occurs.
Positive buoyancy
400
Fluids expand and become less dense when this environmental factor increases.
Temperature
400
A drop of motor oil takes 7.43s to fall 26.4cm. What is its flow rate?
3.55cm/s
500
Rank these from low to high viscosity: lava, cream, milk, mayonnaise, dish soap.
Milk, cream, dish soap, mayonnaise, lava
500
What happens to a fluid when you add solutes like salt?
It becomes more dense.
500
The buoyant force depends on both the density of the fluid and these properties of the object.
The mass and shape of the object.
500
This force, caused by a fluid, acts upwards and is important in determining whether an object sinks or floats.
Buoyancy
500
What did you find if the object has a mass of 107g and when put into a graduated cylinder the level goes from 10mL to 15mL?
Platinum
600
Which fluid once took over a decade to form a single drop, demonstrating extremely high viscosity.
Pitch
600
Why is water unique when discussing its density?
It is the only substance where it is less dense as a solid than a liquid.
600
Explain why an obect would be negatively buoyant.
The weight of the object is greater than that of the water is is displacing.
600
What is the formula for concentration?
Concentration = mass of solute (g) / volume of solvent (mL)
600
A cup of some unknown fluid loses volume due to evaporation. It goes from 80g to 60g. What volume was lost if the density of the fluid is 3.7g/mL?
5.4mL