How long does it take for an ultrasound wave to reach a bone 4.77 cm deep in a human body and bounce back to the transducer?

According to Section 16.10, the smallest detail that can be resolved by medical ultrasound is essentially equal to one wavelength of the sound. (a) If the speed of a 2.20 MHz (1MHz=106 Hz) ultrasonic wave in human tissue is 1540 m/s what is the size in mm of the smallest structure that can be observed (1000 mm=1 m)?(b) How far below the surface of the skin can the sound waves penetrate? Assume their maximum penetration depth is 2.00 x 10^2 wavelengths. (c) How long would it take the sound waves to leave the transmitter, reach their maximum depth, and return to the receiver at the skin's surface?

A sonic depth gauge is placed 3.6 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.018 seconds after it was emitted. The air temperature is −20°C. (a) How far (in m) is the surface of the snow from the device? (Round your answer to at least three significant figures.)   m?

A ship mapping the depth of the ocean emits a sound of 37 kHz. The sound travels to the ocean floor and returns 0.65 s later. (a) How deep is the water at that location? (b) What is the wavelength of the wave in water? (c) What is the wavelength of the reflected wave as it travels into the air, where the speed of sound is 350 m/s?

A sonic depth gauge is placed 5.4 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.029 seconds after it was emitted. The air temperature is −20°C. (a) How far (in m) is the surface of the snow from the device? (Round your answer to at least three significant figures.)   m (b) How deep (in m) is the snow?  m

Sound waves can be modeled as a spherical plane wave. For radial distances of 0.75 m, 2.5 m, and 5.5m, for a horn of 200 W, determine the inensities at each of these locations.

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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 of 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? What was the maximum displacement A of the molecules in the tissue as the beam passed through? λ = Etotal A = = 5.06 X10-4 5.8 ×10¹2 Incorrect 3.15 x10-7 Incorrect m m

A sonic depth gauge is placed 4.9 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.026 seconds after it was emitted. The air temperature is −20°C. (a) How far (in m) is the surface of the snow from the device? (Round your answer to at least three significant figures.)  m (b) How deep (in m) is the snow?  m