Basic physics Flashcards
What is matter
Anything that occupies space and has mass
What are the different states of matter
Solid, liquid, gas, plasma
When fluid passes through the middle section of Venturi, what pressure and velocity changes occur
Pressure drops velocity increases
Are liquids compressible
No
What is the standard atmospheric pressure at sea level
14.7 psi or 29.92 inches of HG
What is the standard daytime temperature
59°F
What is the name of the atmospheric phenomenon were cold air is trapped near the earth by warmer air
A temperature inversion
What is the speed of sound through the air under standard sea level conditions
662 kn or 761 mph
What is meant by the density of air
The mass of a given volume of air
What determines the density of the air
Temperature and pressure acting on it
What does specific gravity mean
It is the ratio of a substance density to the density of pure water
What are the three basic parts of a lever
Fulcrum, force of effort, and resistance
What is the first class lever, and give an example
When the fulcrum is located between the effort and the resistance the example of a first class lever is a seesaw
In what direction is forced transmitted to a confined liquid
Force is transmitted equally in all directions because it cannot be compressed
What is the formula for computing force, pressure, an area
Force equals pressure times area F= P x A
What is kinetic energy
Energy in an object created from its Movement
What is potential energy
Energy that is stored and can be turned into kinetic energy
What is absolute zero
It is the temperature at which all motion of the atoms Will cease entirely in a given sample of gas. It is considered to be -273°C
What are the two factors Involved in work
Force and movement through a measurable distance
How is pressure expressed in hydraulics and pneumatics
It is expressed in pounds per square inch
Name the forms of energy they can be converted into heat energy
Mechanical, electrical, chemical, radiant, nuclear, and solar
What are the three methods of heat transfer
Conduction, convection and radiation
What are the three types of friction
Rolling, sliding, and static
What are the four forces experienced by an aircraft in flight
Gravity, thrust, lift, and drag
What is an autorotation
When the helicopter rotor blades spin without engine power has air flows through the rotor
How does blade flapping help compensate for the cemetery of lift in helicopter main router systems
By increasing the angle of attack on the retarding blade, and decreasing angle of attack on the advancing blade
What is the name of the imaginary line that runs from the leading edge, to the trailing edge of an air foil
Chord line
What function do wing mounted Vortext generator serve
Prevent airflow separation from the upper surface of the wing
What is directional stability
The ability of an aircraft to avoid yawing
What is magnetism
Motion of an electric charge, resulting in a tractive and repulsive force between objects
