buoyancy
Difference between fluid dynamics and fluid mechanics
Fluid dynamics are the study of fluids in motion, and what affects fluidity
Fluid mechanics include fluid in motion and at rest
Flow rate and how its measured
Flow rate describes how quickly a fluid moves.
Amount divided by time = Flow rate
Sink or Float and why
Object density>Liquid density= Sink
Object density<Liquid density= Rise
Object density=Liquid density= Float
What are hydraulic systems and pneumatic systems?
Systems that use water and other liquids are called hydraulic systems. Systems that use air and other gases are called pneumatic systems. EX: Hydraulic systems; water gun and hydraulic press. Pneumatic; air rifles and airbags.
Calculating density
The formula for calculating density is;
Mass/Volume
For example, 5g/2 cm3 = 2.5g/cm3
What happens when you add salt to water with buoyancy?
When you add salt to water, the salt dissolves and breaks down in the water. Therefore increasing the density of the water makes it easier for objects to float and stay buoyant.
Particle Theory: why are both gases and liquids fluids?
Gases and liquids are fluids because they both flow. Fluids have space between their particles which allows them to flow and take the shape of their container just as gases and liquids do.
What are Solids and liquids measured in when calculating density? (units of measurement)
Solids: g and Kg
Liquids: mL and L
How is buoyancy determined?
Buoyancy is determined by comparing the weight in the air to its weight in the liquid. The amount that the weight is reduced is the buoyant force.
Viscosity- what is it and examples of low and high viscosity fluids
Viscosity describes how thick a fluid is or how resistant it to flow.
Fluids that have high viscosity flow slower, while fluids that have low viscosity flow faster.
Define mass, volume, density
Mass - Is a measure of how much matter an object has, it can be measured in grams or kilograms.
Volume -The amount of space taken up by an object.
Density - The amount of mass in a certain volume of a substance.
Factors that affect viscosity
A few factors that can affect viscosity; Temperature, Shape of the particles, and size of the particles.
Measuring buoyancy
F= wA-wL
wA= weight in air
wL= weight in liquid
F= buoyant force
MEASURED IN NEWTONS