- #1
Kolika28
- 146
- 28
Homework Statement
In a kidney study, ultrasound was used with frequency 3.5 MHz. In normal body tissue, the speed of the ultrasound is 1.50 km / s, while the speed in the kidney tissue is 1.55 km / s. Reflected signals came as follows: after 20 microseconds from the skin, after 75 microseconds from the front of the kidney, and after 152 microseconds from the back of the kidney.
Find out how long the kidney is across.
Homework Equations
S=v*t
The Attempt at a Solution
(152-75-20)/2=28,5
S=v*t=(1,55*1000)*(28,5*10^(-6)=0,044175
But the answer is 6 cm