Fluids: Viscosity, Density, Bouyancy Flashcards
What is Viscosity?
Name a real world application of Viscosity.
Name a mathematical explanation of Viscosity.
Scientific definition:
The internal friction within the particles of a fluid. Viscosity is described by the thickness of a fluid, and by the rate at which a fluid flows. Fluids that flow slowly, are thick and have a high viscosity.
Real world application:
A real world application of viscosity in our society are brake fluids because It transmits forces through the system and it wouldn’t work correctly if the viscosity was different. Also, another example of viscosity that’s used in the world today is the comparison between water and vegetable oil because water has a thinner fluid having a lower viscosity than vegetable oil, while vegetable oil has a thicker fluid, having a higher viscosity.
Mathematical explanation:
Flow rate is calculated by the time travelled over distance. By using flow rate and the gres method, the more viscosity the less flow rate.
What is Density?
Name a real world application of Density.
Name a mathematical explanation of Density.
Scientific definition:
The mass of an object or substance per unit volume. Density of an object is its mass divided by volume. Density can be measured in kg/m3 or g/cm3. A substance or object that has molecules that are closely packed together will have a high density An object made from dense material.
Real world application:
Helps define what sinks and floats in water
Examples are ships, submarines, # of people per unit area or volume, hot air balloons, oil spills and etc
Also used for finding out whether an object is made of real or fake metal (Ex. Gold,Silver, Copper)
Story Example: Archimedes found out how to find the volume of irregular objects using water displacement because the king needed to know whether his crown was real gold (Which is how the Archimedes Principle was found)
Mathematical explanation:
Density is calculated by dividing an object’s mass by its volume to get it’s density. Density is often shown as g/cm3. Grams is a mass and cubic centimetres is a volume. Mass is the amount of matter in an object and the volume of an object is a measure if the amount of space an object takes up.
What is Buoyancy?
Name a real world application of Buoyancy.
Name a mathematical explanation of Buoyancy.
Scientific definition:
The force caused by an imbalance of water pressure. The buoyant force pushes against the force of gravity due to the fact that water pressure increases the further down an object is submerged in water. It is related to density. Objects that are less dense than water will have a buoyant force stronger than the force of gravity, and will float.
Real world application:
Life jackets
Boats
Mathematical explanation:
Buoyant Force > Force of Gravity = Floating Density < 1g/ml = Floating
What is a Fluid?
A fluid is any substance that flows. Fluids can be either gases or liquids.
What is Flow rate?
Flow rate is the time it takes a fluid to flow from one point to another. Flow rate is used to measure the viscosity of a liquid.
What is Mass?
Mass is the amount of matter in a substance (matter is anything that takes up space).
What is the formula to calculate density?
Density = Mass ÷ Volume
What is Archimedes Principle?
Archimedes principle states that the amount of fluid displaced by a submerged object is equal to the volume of the object.
