Final answer:
No, a 155-dB ultrasound is not in the range of intensities used for deep heating as it is significantly higher than typical levels used in therapeutic applications and is capable of destroying tissue. Therefore, the correct option is b).
Step-by-step explanation:
When considering whether a 155-dB ultrasound is within the range of intensities used for deep heating, it is essential to compare this intensity with the standard values. Deep heating techniques typically use lower intensities of ultrasound. For example, in medical diagnostics, an intensity level of 2.00 × 10-2 W/m² is common, which corresponds to a lower decibel level than 155 dB.
The intensity of a sound wave can be related to its decibel level using the formula ℓ = ℓ0 × 10(dB/10), where ℓ is the intensity in W/m² and ℓ0 is the reference intensity of 1 × 10-12 W/m². Applying this formula, we can calculate that 155 dB corresponds to an exceedingly high intensity far above what is used for deep heating purposes and is more in line with intensities used to pulverize tissue during surgery, like those at 105 W/m² or even higher. Consequently, the correct option is (b) No, 155-dB ultrasound is not in the range of intensities typically used for deep heating, as it is much higher and can potentially destroy tissue rather than just warming it.