32 terms

# Basic Physics

Basic physics needed to know in the aeronautics field. Terms relating to gas laws and etc.
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The 3 States of Matter
Solid, Liquid, Gaseous
Substance that exist in all 3 states
H2O
Solids under pressure
Little heat energy, molecules are close together, and incompressible
Liquids under pressure
Molecules are farther apart, still incompressible, no definite shape
Gas under pressure
Molecules are loosened, compressible, no definite shape
The 8 characteristics of matter
Weight, mass, attraction, porosity, impenetrability, density, volume, and specific gravity
Density
Mass of a substance per unit of its volume
Specific gravity
The ratio between the weight of a given volume of a material to the same volume of pure water
Temperature
Level of agitation
Heat
Form of energy/Energy that is associated with the motion of molecules within a material
3 ways pressure is measured
Gauge pressure (psig), Absolute pressure (psia), Differential pressure (psid)
Kinetic theory of gases
Molecules spread apart are always in constant motion due to agitation caused by heat
Boyle's Law
Changing volume of a confined gas held at a constant temperature is direct to gas pressure changing or if the temperature of a gas is held constant, the volume is decrease, the pressure will increase.
Charles Law
The volume of a gas held constant, but the pressure increases and decreases in direct proportion to the change in absolute temperature
Pascal's Law
Pressure applied to a confined liquid, that liquids then exerts an equal amount of pressure in right angles to the container that encloses it
Standard Day/ISA
Standard atmosphere defined at sea level with pressure, temperature and density
3 classes of lever
First-class lever, second-class lever, and third-class lever
Work
Force applied to an object causes the object to move (W=FxD or Work = Force x Distance)
Power
Amount of work done in time (P=FxD/T or Power = Force x Distance/Time)
Energy
Capacity of an object to perform work
2 Types of energy
Kinetic Energy and Potential Energy
Kinetic energy
Energy in motion
Potential energy
Energy at rest
Momentum
Force of an object in motion, and the tendency of a body to continue in motion after being placed in motion
Heat measurement
BTU or British Thermal Unit (1BTU = 778 ft-lbs), or Metric System is Calories = 0.42 meter-kilogram or 3.09 ft-lbs of work
Conduction
Physical contact between a body having a high level of heat and a body having a lower level of heat
Convection
Heat is transferred by movement