Fluids
What is a fluid?
Any substance that flows
What is volume?
A measurement of the amount of space occupied by a substance
What is viscosity?
A measure of a fluid's resistance to flow
What is the equation for density?
Density = Mass/volume
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
What is mass?
The amount of matter or particles within in a substance
True or False:
Does viscosity apply to a solid?
False - solids do not flow
What is the density of an item that has a mass of 500g and a volume of 50 g/mL?
10g/mL
Explain evaporation
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 density?
The amount of mass in a certain unit volume of a substance
What is the instrument used to measure viscosity?
A viscometer
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 gas?
The state of matter of a substance that has neither a definite shape nor a definite volume
What is buoyancy?
The tendency of an object to sink or float
What is surface tension?
The increased attraction among the particles at the surface of a fluid.
In a liquid, the attractive forces between the particles at the surface of the fluid are greater than the attractive forces between particles elsewhere in the fluid.
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
State the three points of Kinetic Molecular Theory
1. All matter is composed of molecules or other types of particles
2. Particles are in constant motion
3. There are forces of attraction among particles
What is the difference between laminar and turbulent flow?
With laminar flow, the water travels in straight or almost straight lines.
With turbulent flow, the water is broken or choppy and is unable to travel in straight lines.
What is the difference between cohesion and adhesion?
Cohesion is the attractive forces between the particles of the same substance
Adhesion is the attractive forces between the particles of one substance and another 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