Question

Please help with part C

Question 15 This question contains multiple parts. Make sure to read all the instructions and answer each part. BONUS QUESTION! A doppler fetal monitor is a hand-held ultrasound device that is used to detect a fetal heartbeat in prenatal care. The device works by measuring the speed of the fetus's ventricular wall and thereby tracking its heartrate. Part a Suppose the fetus's ventricular wall moves back and forth in a pattern approximating simple harmonic motion with an amplitude of 1.7 mm and a frequency of 3.0 Hz. Find the maximum speed of the heart wall (in m/s) during this motion. Be careful of units! 0.032m/s ower 1 of 4 attempts used CHECK ANSWER Part b Suppose that the ultrasound source placed on the mother's abdomen produces sound at a frequency 2 MHz (a megahertz is 10 Hz) Sound travels through tissue at roughly the same speed as in water (v 1500m/s). Find the maximum change in frequency between the sound that is emitted by the device and the sound that is observed at the wall of the baby's heart. Treat the heart wall as a moving observer. Hint: you will need to use your answer from part (a). Give your answer as a positive number in Hz. 2.7Hz ower nswer was 42.67 which differs from the answer above by a small rounding error or significant figures. Check with your instructor how this will be graded in a testing situation

Answer 1

Here we use the concept of Doppler'sEffect. For part C, the ventricular wall will be treated as source and the device will be treated as observer.