resumen de fisica
RESUME
Units of area = cm2, ft2
Units of volume = cm3, ft3
Type of wave: heat, sound, magnetic, light.
-All waves carry energy from one location to another
Sound waves (acoustic waves): Travels through a medium Are mechanical Are longitudinal Generally travels in a straight line Are best described as a series of compressions and rarefactions.
Diagnostic ultrasound: uses mechanical and longitudinal waves.
Acoustic propagation properties: the effect of a medium upon the sound wave.
Biologic effect: the effect of the sound wave upon the biologic tissue through which passes.
Acoustic variables:
Pressure: concentration of force in an area. (Pascal, Lb/in2, N/m2) Pressure = force applied Area
Density: concentration of mass in a volume. (Kg/m3, Lb/in3)
Distance: measures of particle motion. (cm, feet, mile)
Temperature (in some books): concentration of heat energy. (Degrees)
Transverse waves: particle moves in a direction that is perpendicular to the direction than the waves propagates.
Longitudinal waves: particles moves in the same direction that the waves propagates.
In phase waves: their peak (maximum value) and the minimum value 0ccur at the same time and the same location.
Out of phase waves: their peaks occur at different time and location.
Two out of phase waves with the same amplitude cancel each other.
Interference: multiples beams arrived at an identical location at exactly the same time (waves loses their individual properties and combine to create a new one. (Constructive or destructive)
Interference of waves with different
Constructive interference: Two in phase waves form one
Units of area = cm2, ft2
Units of volume = cm3, ft3
Type of wave: heat, sound, magnetic, light.
-All waves carry energy from one location to another
Sound waves (acoustic waves): Travels through a medium Are mechanical Are longitudinal Generally travels in a straight line Are best described as a series of compressions and rarefactions.
Diagnostic ultrasound: uses mechanical and longitudinal waves.
Acoustic propagation properties: the effect of a medium upon the sound wave.
Biologic effect: the effect of the sound wave upon the biologic tissue through which passes.
Acoustic variables:
Pressure: concentration of force in an area. (Pascal, Lb/in2, N/m2) Pressure = force applied Area
Density: concentration of mass in a volume. (Kg/m3, Lb/in3)
Distance: measures of particle motion. (cm, feet, mile)
Temperature (in some books): concentration of heat energy. (Degrees)
Transverse waves: particle moves in a direction that is perpendicular to the direction than the waves propagates.
Longitudinal waves: particles moves in the same direction that the waves propagates.
In phase waves: their peak (maximum value) and the minimum value 0ccur at the same time and the same location.
Out of phase waves: their peaks occur at different time and location.
Two out of phase waves with the same amplitude cancel each other.
Interference: multiples beams arrived at an identical location at exactly the same time (waves loses their individual properties and combine to create a new one. (Constructive or destructive)
Interference of waves with different
Constructive interference: Two in phase waves form one