1. The problem statement, all variables and given/known data Ultrasound reflected from an oncoming bloodstream that is moving at 28.7 cm/s is mixed with the original frequency of 2.41 MHz to produce beats. Use the speed of sound in human tissue as 1540 m/s. Assume that the frequency of 2.41 MHz is accurate to seven significant figures. (Hint: compare to Example 17.8 in OpenStaxCollege Physics.) a) What frequency does the blood receive? (Give an answer in MHz, to 7 significant figures.) b) What frequency returns to the source? (Give an answer in MHz, to 7 significant figures.) c) What beat frequency is produced if the source and returning frequencies are mixed? (Give an answer in Hz, to 3 significant figures.) 2. Relevant equations f(observed) = f(s) x (Vw / Vw +/- Vs) f(observed) = f(s) x (Vw +/- V(obs)) / Vw 3. The attempt at a solution a) (2,410,000 Hz)(1540 m/s + .287 m/s) / 1540 m/s) = 2410449.136 Hz = 2.410449 MHz b) (2410449 Hz)(1540 / 1540 - .287) = 2410948.313 Hz = 2.410948 MHz c) 2410948.313 - 2410000 = 948 Hz a) is correct, I got that one right. b) and c) are wrong. I thought I did them correctly. Could someone please help? Thank you!