Final answer:
The wavelength of a 1MHz sound wave in soft tissue, where the speed of sound is approximately 1540 m/s, is 1.54 millimeters.
Step-by-step explanation:
In soft tissue, the wavelength of a sound wave can be determined by using the formula for wave speed, which is speed = frequency × wavelength. Therefore, the wavelength (λ) can be calculated as λ = speed / frequency. Given that the speed of sound in soft tissue is approximately 1540 m/s, and the question asks for the wavelength at a frequency of 1MHz (1MHz = 1×106 Hz), the wavelength would be λ = 1540 m/s / 1×106 Hz = 0.00154 meters, or 1.54 millimeters.