SONOGRAPHY CANADA PHYSICS CORE 2023/24 WITH COMPLETE SOLUTION

SONOGRAPHY CANADA PHYSICS CORE 2023/24 WITH COMPLETE SOLUTION what is media/medium - biological tissue what do all waves carry from one location to another - energy sound is a ____________ wave in which particles in the medium move - mechanical where can sound not travel - in a vacuum are sound waves transverse or longitudinal waves - longitudinal the effects of the medium upon the sound wave - acoustic propagation properties what are used to distinguish between sound waves and other types of waves - acoustic variables- pressure, density, and distance (measure of a particle motion) what are the 3 acoustic variables - pressure, density and distance concentration of force in an area - pressure what is pressure measured in - pascals (Pa) concentration of mass in a volume - density what is volume measured in - kg/cm^3 (cubic) what describes a sound waves features - acoustic parameters what are the 7 acoustic parameters - period, frequency, amplitude, power, intensity, wavelength, propagation speed how do particles move in soundwaves - longitudinally- particles move in the same direction that the wave propagates (parallel) in-phase wave - when their peaks and troughs occur at the same time out of phase wave - peaks and troughs occur at difference times -either inverted or out of step what occurs when waves lose their individual characteristics and combine to form a single wave - interference what combination of waves results in the formation of a single wave of greater amplitude of either components - constructive interference what kind of wave causes the formation of a single wave of lesser amplitude causing what types of interference - out of phase destructive interference what occures when 2 out of phase waves of equal amplitude interfere - complete destructive interference what types of waves (phase) occur with complete destructive interference - out of phase waves what causes waves to be momentarily in phase and out of phase (causing constructive and destructive interference) - waves of difference frequencies what type of waves of difference frequencies result in (type of interference) - constructive and destructive what direction of the graph is verticle vs horozontal - y=vertical x=horozonatal what is a reciprocal - when the 2 numbers are multiplied together to = 1 (10 x 1/10) tracy gets made king huge dense dummy cause millions (of) micro nuisances pileup - tera (10^12) giga (10^9) mega (10^6) kilo (10^3) hecto (10^2) deca (10^1) deci (-1) centi (-2) milli (-3) micro (-6) nano (-9) pico (-12) hertz to mega hertz - 1 000 000 > 1 what do parameters describe - the features of a sound wave. 7 parameters are required to ompletely characterize a sound wave which 2 parameters are reciprocals - period and frequency which parameters describe a waves bigness - amplitude, power, intensity which parameter is determined by the sound source and the medium - wavelength which parameters are determined by the sound source - period, frequency, amplitude, power, and intensity which parameter is determined by the medium - speed what is the time it takes a wave to vibrate a single cycle or the time from the start of one cycle to the start of the next cycle - period what units is the period reported in - time; microseconds, seconds what are the typical values of period in diagnostic US - 0.06-0.5microseconds 0..0000005 (ms) what is period determined by - sound source only can the sonographer adjust period - no what is the number of particular events that occur in a specific duration of time - frequency in US, what event is counted in frequency - number of cycles what units is frequency reported in - unit per second hertz/Hz, Hertz what are the ty