To solve this problem, we need to know the speed of sound in the liver. The speed of sound varies depending on the medium it is traveling through. In human tissues, it's typically around 1540 m/s, but it can vary slightly.
Once we have the speed of sound, we can use the formula for distance, which is speed multiplied by time. However, since the sound wave travels to the reflector and back, the time we have is actually twice the time it takes for the sound wave to reach the reflector. Therefore, we need to divide the total time by 2 to get the time it takes for the sound wave to reach the reflector.
Let's use these values to calculate the distance.
The distance from the source to the reflector is approximately 1.54 millimeters (mm).
This is calculated by using the speed of sound in the liver (1540 m/s) and the time it takes for the sound wave to reach the reflector (1 microsecond, which is half of the total time of 2 microseconds). The formula for distance is speed multiplied by time, so the calculation is 1540 m/s * 1 microsecond = 0.00154 meters, or 1.54 mm.