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
Explain melting
The change from solid to liquid
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 evaporization
the change from liquid to gas
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 condensation
the change from gas to liquid
What is a liquid?
The state of matter of a substance that has a definite volume but no definite shape
What did Archimedes discover?
The volume of an object is the same as the amount of water that is displaced when it is put into a container filled with water
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 freezing
Change from liquid to solid
What is a gas?
The state of matter of a substance that has neither a definite shape nor a definite volume
What happens if something that is placed in a liquid where the object is more dense than the liquid?
It sinks/does not float.
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 sublimation
Change from solid to gas
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 are five of factors that can affect a fluids viscosity?
Friction, Cohesion, Adhesion, Temperature, Concentration, Particle size