Density and Buoyancy
What is buoyancy?
It is the tendency for the object to rise or float in a fluid.
(The upward force exerted on an object in a fluid. )
What is the equation for density?
Density = Mass/volume
What are the 3 states of matter
Solid, liquid, gas
What is a fluid?
Any substance that flows
What is viscosity
A measure of a fluid's resistance to flow
What is buoyant force?
The upward force exerted on objects submerged in fluids
What is the density of an item that has a mass of 500g and a volume of 50 g/mL?
10g/mL
Explain melting
The change from solid to liquid
What is a solid?
The state of matter of a substance that has a definite shape and volume
True of False:
Does viscosity apply to a solid?
False - solids do not flow
What is density?
The amount of mass in a certain unit volume of a substance
What is the density of an item that has a mass of 70g and a volume of 103cm3?
0.68 g/cm3
Explain evaporization
the change from liquid to gas
What is a liquid?
The state of matter of a substance that has a definite volume but no definite shape
What is Pascal's Law
Any pressure exerted on a fluid will be distributated evenly throughout the fluid.
What is mass?
The amount of matter or particles within in a substance
What is the volume of an item that has a mass of 2 g and a density of 19.32 g/cm3?
0.1 cm3
Explain condensation
the change from gas to liquid
What is a gas?
The state of matter of a substance that has neither a definite shape nor a definite volume
What type of system can be described by liquids that are under pressure in a confined space (ex. oil in tubes).
Hydraulic systems
What is volume?
A measurement of the amount of space occupied by a substance
What is the mass of an item that has a density of 0.0013g/mL and a volume of 550 mL?
0.715 g
Explain freezing
Change from liquid to solid
Give the 5 major points of the particle theory
1) All matter is made up of very small particles
2) All particles in a pure substance are the same
3) There is space between the particles
4) Particles are always moving
5) Adding heat to particles will make them move faster
What fluid does pneumatic system use
Gas (air)