High-intensity focused ultrasound (HIFU) is one treatment for certain types of cancer. During the procedure, a narrow beam of high-intensity ultrasound is focused on the tumor, raising its temperature to nearly 90 °C and killing it. A range frequencies and intensities can be used, but in one treatment a beam of frequency 3.10 MHz produced an intensity of 1425.0 W/cm². The energy was delivered in short pulses for a total time of 2.60 s over an area measuring 1.20 mm by 5.30 mm. The speed of sound in the soft tissue was 1570 m/s, and the density of that tissue was 1492.0 kg/m³. What was the wavelength of the ultrasound beam? How much energy Etotal was delivered to the tissue during the 2.60 s treatment? λ = 5.06 ×10-4 58 x10¹2

High-intensity focused ultrasound (HIFU) is one treatment for certain types of cancer. During the procedure, a narrow beam of high-intensity ultrasound is focused on the tumor, raising its temperature to nearly 90 °C and killing it. A range frequencies and intensities can be used, but in one treatment a beam of frequency 3.10 MHz produced an intensity of 1425.0 W/cm². The energy was delivered in short pulses for a total time of 2.60 s over an area measuring 1.20 mm by 5.30 mm. The speed of sound in the soft tissue was 1570 m/s, and the density of that tissue was 1492.0 kg/m³. What was the wavelength of the ultrasound beam? How much energy Etotal was delivered to the tissue during the 2.60 s treatment? λ = 5.06 ×10-4 58 x10¹2

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter17: Sound

Section: Chapter Questions

Problem 113P: What frequency is received by a mouse just before being dispatched by a hawk flying at it at 25.0...

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