Duty factor equation Study guides, Class notes & Summaries

How DC motors operate? Magnetic lines of force are continuous and always form closed loops; Magnetic lines of force do not cross. Armature: (Definition) The rotating windings of a DC motor. The ____ is a movable electromagnet located between the poles of another fixed permanent (field) magnet as shown. Armature A twisting force called ______ must be developed. _____ is produced by mounting a loop in a fixed magnetic field and as long as the fields of the magnet and armatu...

Purdue ECON 252 Exam 2 Latest Update Graded A capital accumulation the growth of capital resources, including human capital. when a country saves more, this grows faster. aggregate investment savings rate x GDP political creative destruction the process in which economic growth destabilizes existing regimes and reduces the political power of rulers. creative destruction refers to the process by which new technologies replace old ones, new businesses replace established companies, and new skil...

In nonlinear propagation, additional frequencies appear that are ___ and ___ multiples of the fundamental frequency. They are called ___. Even Odd Harmonics Duty factor equation DF = PD/PRP Brainpower Read More Harmonics are created where? Beams main axis A sector image with a curved top is produced by which type of transducer? Curvilinear / Modified Sector / Convex Transducer Diagnostic sonography encompasses ____________ and __________ Sonography & Doppler p...

Edelman SPI review questions & Answers 2023. ______ is the distance covered by one cycle. a) pulse length b) wavelength c) cycle distance d) cycle duration ______ is the time to complete one cycle a) pulse duration b) pulse period c) period d) duration period ________ is a redirection of an ultrasound bean in many directions as a result of a rough boundary between two media: a) refraction b) Rayleigh Scattering c) scattering d) reflection _________ resolution is...

SPI Exam Review Questions And Answers (Updated And Verified) Ultrasound imaging type in which pulses are reflected and used to produce a display - answerpulsed wave brightness of the dots on image - answeramplitude round-trip travel time per cm in soft tissue - answer13 microseconds A line produced on a display that represents ultrasonic echoes returning from the body. A sonographic image is composed of many such lines. - answerscan line Type of image presented in a rectangular format. ...

Sonography Canada - Core Exam 114 Questions and Answers A+ Score. what is the I SPPA for mechanical bioeffects? - ANSWER 190W/cm^2 what is the I SPTA for thermal bioeffects? - ANSWER 720mW/cm^2 recommended MI for fetal scanning - ANSWER MI < 1.9 recommended TI for fetal scanning - ANSWER TI < 0.7 after what fetal age is safe to use PW doppler? - ANSWER 14 weeks what does ALARA stand for - ANSWER as low as reasonably achievable frequency - ANSWER # of cycles/second f = 1/p period -...

Sonography Canada - Core Exam Questions and Answers A+ Score. what is the I SPPA for mechanical bioeffects? - ANSWER 190W/cm^2 what is the I SPTA for thermal bioeffects? - ANSWER 720mW/cm^2 recommended MI for fetal scanning - ANSWER MI < 1.9 recommended TI for fetal scanning - ANSWER TI < 0.7 after what fetal age is safe to use PW doppler? - ANSWER 14 weeks what does ALARA stand for - ANSWER as low as reasonably achievable frequency - ANSWER # of cycles/second f = 1/p period - ANS...

SPI Exam Review Questions With Verified Answers What is frequency determined by? - answerThe source, thickness of piezoelectric element and propagation speed to a lesser degree Thicker element is equal to ________ frequencies - answerLower What is the reciprocal of frequency and what is the symbol - answerPeriod, T The time it takes for 1 cycle to occur - answerPeriod What is propagation speed determined by - answerStiffness and density of the medium Propagation speed of sound through so...

SPI Exam Review Questions And Answers (Updated And Verified) Ultrasound imaging type in which pulses are reflected and used to produce a display - answerpulsed wave brightness of the dots on image - answeramplitude round-trip travel time per cm in soft tissue - answer13 microseconds A line produced on a display that represents ultrasonic echoes returning from the body. A sonographic image is composed of many such lines. - answerscan line Type of image presented in a rectangular format. ...

what is the I SPPA for mechanical bioeffects? -ANSWER 190W/cm^2 what is the I SPTA for thermal bioeffects? -ANSWER 720mW/cm^2 recommended MI for fetal scanning -ANSWER MI < 1.9 recommended TI for fetal scanning -ANSWER TI < 0.7 after what fetal age is safe to use PW doppler? -ANSWER 14 weeks what does ALARA stand for -ANSWER as low as reasonably achievable frequency -ANSWER # of cycles/second f = 1/p period -ANSWER time it takes for 1 cycle to occur (usec) P = 1/f ...