Propagation speed - Study guides, Class notes & Summaries

SPI PRACTICE QUESTIONS WITH 100% CORRECT ANSWERS ALREADY PASSED A+ 2024 Sound waves are: - ANS-longitudinal, mechanical The speed of sound in soft tissue is closest to: - ANS-1,500 m/s The frequency closest to the lower limit of ultrasound is: - ANS-15,000 Hz Which is not an acoustic variable? - ANS-intensity The effects of soft tissue on ultrasound are called: - ANS-acoustic propagation properties All of the following are true EXCEPT: - ANS-two waves with identical frequencies mus...

ARDMS SPI Exam Review Guide Questions with 100% Correct Answers Sound waves are: a) electric b) mechanical, transverse c) spectral d) longitudinal, mechanical - CORRECT ANSWER-D The speed of sound of ultrasound in soft tissue is closest to: a) 1,540 km/sec b) 1.54 km/sec c) 1,500 m/s d) 1,540 mm/sec - CORRECT ANSWER-C Which is not an acoustic variable? a) density b) pressure c) distance d) intensity - CORRECT ANSWER-D The effects of soft tissue on ultrasound are calle...

2.4 GHz wavelength - longer wavelengths, better range larger channel widths - provide faster speed and throughput but can create greater interference 5 GHz wavelength - supports faster data rates at shorter distances, suited for high density deployments because of greater number of channels that do not overlap What channel widths do 2.4 GHz support? - 20 and 40 MHz What channel widths do 5 GHz support? - 20, 40, 80, 160 MHz omnidirectional antenna - Can transmit and receive with 360-degree...

SPI ARDMS Exam – Questions & All Correct Answers (Rated A+) SPI ARDMS Exam – Questions & All Correct Answers (Rated A+) The time from the beginning of a pulse until its end is ______________? - ANSWER - pulsed duration What happens to the speed of sound in a medium when the bulk modulus of the medium increases? - ANSWER - faster ___________ resolution is determined by SPL - ANSWER - radial or axial If a wave's amplitude is doubled, what happens to the power? - ANSWER - quad...

Spatial Pulse Length is directly proportional to - ️️the Number of Cycles in the Pulse and the Wavelength (Directly Proportional means that increased SPL will increase both the number of cycles in the pulse and the wavelength if increased). Spatial pulse length is inversely proportional to - ️️Frequency (MHz) (Inversely Proportional means that increased SPL will lower frequency. This is because axial resolution is better with lower frequency) In soft tissue, if the frequency of ...

SPI Mock Exam (2024) || Complete Questions & Answers (Graded A+) SPI Mock Exam (2024) || Complete Questions & Answers (Graded A+) The mechanical index predicts the likelihood of: A. Cavitation B. Aliasing C. Turbulence D. Doppler shift E. Thermal damage - ANSWER - A. Cavitation Mirror imaging artifact is a result of a(n): A. A weak reflector B. Strong reflector C. Impedance difference D. Weak attenuation structure E. Strong attenuating structure - ANSWER - B. Stro...

Which of the following is described as the ability of an object to resist compression and relates to the hardness of the medium? a. Stiffness b. Density c. Pressure d. Inertia -answer- a. Stiffness An increase in pulse repetition frequency would lead to: a. an increase in DF b. an increase in pulse duration c. an increase in the number of cycles d. a decrease in resolution -answer- a. an increase in DF ? is this b/c PRP and PRF are reciprocals so if you increase PRF you decrease PRP...

NSCA CPSS Exam 57 Questions with Verified Answers Understand the relevant theory and principles that underpin training. - CORRECT ANSWER Training Load model, Periodization, Parallel training model, Sequential Training Model, Periodization vs Programming - CORRECT ANSWER Periodization is a a macro-management strategy that serves as a training blueprint, from which periods of time are assigned that target specific skills, fitness, or performance related factors. Volume and intensity are inve...

Chapter 3: Conducted and Wireless Media TRUE/FALSE 1. Category 1 twisted pair wire is not recommended for transmitting megabits of computer data. ANS: T PTS: 1 REF: 63 2. Category 1 wire is susceptible to experiencing noise and signal attenuation. ANS: T PTS: 1 REF: 63 3. Category 1 twisted pair wire produces less noise and signal attenuation than Category 2. ANS: F PTS: 1 REF: 63 4. Much of the Category 3 wire sold today is used for new computer network installations. ANS: F PTS: 1 REF: 6...

Reducing the likelihood of bioeffects from acoustic energy is the mission of the: A. Nyquist limit B. Reynolds number C. Huygens principle D. ALARA principle E. Poiseuille principle -answer- D. ALARA principle The number of cycles in a pulse directly related to the: A. Duty factor B. SPL C. operating frequency D. PRF E. propagation speed of the medium -answer- B. SPL The Doppler shift frequency is proportional to the: A. Cosine values B. Doppler angle C. Operat...