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buoyancy
buoyancy
buoyancy
100

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

100

 Flow rate and how its measured

Flow rate describes how quickly a fluid moves.

Amount divided by time = Flow rate

100

 Sink or Float and why

Object density>Liquid density= Sink

Object density<Liquid density= Rise

Object density=Liquid density= Float

200

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.

200

Calculating density

  • The formula for calculating density is;

  • Mass/Volume

  • For example, 5g/2 cm3 = 2.5g/cm3

200

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.

300

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.

300

What are Solids and liquids measured in when calculating density? (units of measurement)

  • Solids: g and Kg

  • Liquids: mL and L

300

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.

400

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.

400

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.

500

Factors that affect viscosity

  • A few factors that can affect viscosity; Temperature, Shape of the particles, and size of the particles.



500

 Measuring buoyancy


  • F= wA-wL

  • wA= weight in air

  • wL= weight in liquid

  • F= buoyant force

  • MEASURED IN NEWTONS