High‑intensity focused ultrasound (HIFU) is one treatment for certain types of cancer. During the procedure, a narrow be

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High‑intensity focused ultrasound (HIFU) is one treatment forcertain types of cancer. During the procedure, a narrow beam ofhigh‑intensity ultrasound is focused on the tumor, raising itstemperature to nearly 90∘C and killing it. A range of frequenciesand intensities can be used, but in one treatment a beam offrequency 4.80 MHz produced an intensity of 1725.0 W/cm2. Theenergy was delivered in short pulses for a total time of 3.80 sover an area measuring 1.70 mm by 5.70 mm. The speed of sound inthe soft tissue was 1540 m/s, and the density of that tissue was1489.0 kg/m3.
What was the wavelength 𝜆 of the ultrasound beam? 𝜆= m
How much energy 𝐸total was delivered to the tissue during the3.80 s treatment? 𝐸total= J
What was the maximum displacement 𝐴 of the molecules in thetissue as the beam passed through? 𝐴= M