Density
This is the amount of space taken up by an object.
What is volume?
This term describes the 'thickness' of a fluid.
What is viscosity?
This is the property of fluids that allows objects to float.
What is buoyancy?
If the buoyant force is less than the weight of an object immersed in a fluid, what will happen to the object?
It will sink.
State Pascal’s Law in your own words.
When pressure is applied to a contained fluid, that pressure is distributed evenly in all directions throughout the fluid.
This is the amount of material found in an object.
What is mass?
What does viscosity measure?
What is a fluid's resistance to flow?
This force opposes the force of gravity in a fluid.
What is buoyant force?
If the buoyant force is greater than the weight of an object immersed in a fluid, what will happen to the object?
It will float.
True or false - fluids in a container compress when pressure is applied.
This is TRUE for gases but FALSE for liquids!
This describes the pull of gravity on a certain mass.
What is weight?
Name three fluids with low viscosity.
Some examples include water, alcohol, milk, coca-cola, orange juice, etc.
Give an example of an object with neutral buoyancy.
a fish, Ms. Vincent’s tomato experiment, a submarine
Explain how you might be able to make a piece of plastic sink in water.
ensure there is no air in it; squish it into a tiny space (increase its density)
What happens to the volume of a contained gas if the pressure is increased?
The gas's volume decreases.
The mathematical definition of density.
What is mass-to-volume ratio?
Name three fluids with high viscosity.
Examples include honey, corn syrup, molasses, ketchup, mustard, etc.
The condition in which the amount of force pulling down on an object (gravity) immersed in a fluid equals the amount of force pushing up (buoyancy).
What is neutral buoyancy?
Explain how you might be able to make a piece of steel float in water.
spread it out into a bowl or boat shape so its surface area is quite large (decrease its density)
What happens to the volume of a contained liquid if the pressure is decreased?
Nothing; liquids are not compressible!
In order to calculate the density of an object, you need to know the following two measurements.
What are the mass and the volume?
How does temperature affect a fluid's viscosity?
In liquids - the higher the temperature, the lower the viscosity. In gases - the higher the temperature, the HIGHER the viscosity.
State Archimedes’ principle in your own words.
The buoyant force acting on an object equals the weight of the fluid displaced by the object.
Explain how a fish or a submarine take advantage of average density.
They use special chambers in their bodies to control their average density so they can move freely in the water.
Name some technologies that use fluids under pressure to do work.
Pneumatic systems - use gas under pressure.
Hydraulic systems - use liquid under pressure.