Basic Physics Flashcards
What are the three types of heat transfer?
Conduction, convection, radiation
What is the atmospheric pressure on a standard day at sea level?
14.7 psi or 29.92 inches of mercury
How is pressure expressed in hydraulic and pneumatic‘s?
PSI
What types of matter are affected by thermal expansion?
Solid, liquid and gases
Are liquids compressible?
No
What is the basic Pascal’s law formula for computing force given pressure and area?
Force = Pressure x Area
In what direction is pressure transmitted when force is applied to a confined fluid?
Equality in all directions
What are the three states of matter?
Solid, liquid and gases
What is the term used to describe the ratio of the amount of water vapor actually present in the atmosphere as compared to when the air is saturated with water vapor?
Relative humidity
On a standard a temperature in degrees Fahrenheit, or Celsius
59°F or 15°C
What factors determine density altitude?
Pressure and atmospheric temperature
What is the approximate speed of sound on a standard day at sea level?
340 m/s or 661.7 kn.
What is the definition of friction?
Opposition to the relative movement between two objects
What does the basic lever machine consist of?
It has a rigid bar and a pivot point called the fulcrum
How does the blade flapping help compensate for the symmetry of lift in a helicopter main rotor system?
Serves to increase the angle attack and lift on the retaining blade of the rotor and decrease the angle of attack and the lift on the advancing blade side