Ultrasound physics Study guides, Class notes & Summaries

Meaning of Anechoic? - Dark, less echos. Meaning of Echogenic? - Full of echoes. Meaning of Hyperechoic? - More echoes than adjacent tissue. Meaning of Hypoechoic? - Less Echoes than adjacent tissue. Meaning of Isoechoic? - Similar/same echoes than adjacent tissue. Meaning of Homogenous? - Uniform Texture. (smooth) Meaning of Heterogenous? - Different levels of echogenicity. Definition of Wavelength? - The length of one cycle. -Denoted by (Lamda) Unit for Wavelength? - m, cm, mm Defini...

1. The four properties of photons are _____, _____, _____ and _____. a. size, shape, spin, mass b. frequency, mass, amplitude, wavelength c. frequency, wavelength, velocity, amplitude d. refraction, velocity, spin, amplitude ANS: C The properties of photons are frequency, wavelength, velocity, and amplitude. DIF: Moderate REF: page 45 OBJ: Identify the properties of photons. 2. The smallest quantity of any type of electromagnetic radiation is a(n) _____. a. photon b. electron c. neutr...

Which of the following transducers will have the worst axial resolution? a. Vector array, 3 MHz b. Linear Sequential Array, 6 MHZ c. Linear Phased Array 7.5 MHZ d. Annular Array, 6 MHz A sound wave is traveling in the body and propagates from muscle to air. What percentage of the sound wave is most likely reflected at the muscle-air boundary? a. 0.5% b. 75% c. 25% d. 5% e. 99%

1. (a) Describe how you would measure the thermal conductivity of a liquid, which is a poor conductor of heat, pointing out the precautions you would take to ensure an accurate result. (b) Explain (i) the observed difference between the temperatures of the seawater and the air during the night-time in the autumn in Hong Kong, and (ii) the survival of fish in frozen-over ponds during the winter in North China. 2. Give accounts of the physics of the working of (a) a Geiger-Muller tube, a...

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AP PHYSICS C ELECTRICITY AND MAGNETISM Unit 1 Progress Check MCQ and Scoring Guide. Latest Update 2023. (GUARANTEED PASS Unit 1 Progress Check: MCQ Three identical point charges form an equilateral triangle with sides of length , as shown. The magnitude of the net force acting on each point charge is , and the potential energy of the system of charges is . One of the three point charges is then replaced by one with a charge . 1. If and , what is the magnitude of the net force...