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Part A A medical ultrasound imaging system sends out a steady stream of very short pulses. To simplity analysis, the reflection of one pulse should be received before the next is transmitted t the syshem is being used to create an image of tissue 15 cm below the skin, what is the minimum time between pulses? Use values given in table id necessary Express your answer with the appropriate units. Medium Air (0 C) Air (20 C) Helium (0 C) Ethyl alcohol Speed (m/s) Δt- 1 Value Units 1170 Human tissue (utrasound)1540 1200 5100 Submit Request Answer Part B 12000 How many pulses per second does this correspond to? Express your answer in pulses per second. pulses per second Submit Request Answer
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