What Is Meant By Matter Flashcards
What is meant by matter?
Anything that occupies space and has weight.
What are the three basic physical states in which matter can exist?
Solid, liquid, and gas.
What is meant by pressure?
Force that acts on a unit of area.
What is the standard sea level atmospheric pressure expressed in inches of mercury and in pounds per square inch?
29.92 inches of mercury and 14.69 pounds per square inch.
What characters of the atmosphere determines the speed of sound?
Its temperature.
What is meant by the fulcrum of a lever?
The point about which the lever rotates.
What formula is used to find the amount of work done when an object is moved across a floor?
Work=Force*distance.
What determines the mechanical advantage of an arrangement of ropes and pulleys?
The number of ropes that support the weight.
What determines the mechanical advantage of a gear trail?
The ratio between the number of teeth on the drive gear and the number of teeth on the driven gear.
What is meant by the resonant frequency of an aircraft structure?
The frequency that produces the greatest amplitude of vibration in the structure.
What is the principle upon which ultrasonic inspection is based?
Any fault within a material will change the material’s resonat frequency. Comparing the resonant frequency of a known sound material with the material under test will indicate the presence of a fault.
