Physics Flashcards
Matter many exist in what three states?
Solid, liquid, and gas
Define kinetic energy?
Is the energy of motion
Work is the product of what two factors?
Force and distance moved.
What is the part of a lever?
A rigid bar and fulcrum.
A wheelbarrow is an example of what class lever?
Second- class lever
What is the British Thermal Unit?
The amount of heat energy needed to raise 1 pound of water 1 degree Fahrenheit.
Name three methods of heat transfer.
Convection, conduction, and radiation
What term defines temperature at which molecular motion ceases?
Absolute zero
Can a liquid be compressed?
No. They are considered incompressible
What are the customary units used to express hydraulic or pneumatic pressure in United States?
Pounds per square inch.
Describe how pressure is transmitted when force is applied to a confined liquid.
It is transmitted equally in all directions.
What formula expresses the relationship between force, pressure and area?
Force = pressure X area
What approximate speed of sound at sea level on a standard day?
662 knots
What is the atmospheric pressure at sea level on a standard day?
29.92 inches of mercury
Are all three states of matter affected by thermal expansion and if so, which state is affected most?
Yes all three are, but gases are affected the most.
What is the factor that determines density altitude?
Temperature and pressure
What are the four principle forces acting on an airplane in flight?
Lift, drag, thrust and gravity
What is the term that describes the angle between the relative wind and the chord line of an airfoil?
Angle of Attack
What is friction?
The relative motion between to objects in contact with each other.
What is the function of wing mounted vortex generator?
Keeps the airflow from separating from the upper surface of a wing during high speed flight.
What are the principle effect that results from lowering the flaps while in flight?
Lift increases, drag increases and stall speed decreases
What are the factors that cause an airplane wing to stall?
The angle of attack exceeds a critical value and the airflow separates from the upper surface and becomes turbulent.
Define matter
Matter is anything that takes up space and has weight
What are three basic parts of a lever
Fulcrum,load and effort
What is absolute zero
When molecules stop moving in a gas
What is a first class lever and a example of a first class lever
Example is a see-saw and it’s when the fulcrum is between the effort and resistance
