What would be the Fresnel zone length of a ultrasound beam with a diameter of a transducer at 1.5E-2 m at frequency of 3 MHz in the bone?
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What would be the Fresnel zone length of a ultrasound beam with a diameter of
a transducer at 1.5E-2 m at frequency of 3 MHz in the bone?
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- The state highway patrol radar guns use a frequency of 9.05 GHz. If you're approaching a speed trap driving 31.3 m/s, what frequency shift will your FuzzFoiler 2000 radar detector see?It is not completely understood what it is about APC ferrules that cause them to have less back reflection than UPC ferrules.(a) To appreciate the human ear’s twelve order of magnitude (10^12) span from barely audible to the pain threshold, consider the following. Suppose an equivalently dynamic instrument were designed to measure distances. Taking the lower limit of the instrument to be 1.00 mm, what would be the largest distance measurable? (b) To provide a perspective for the human ear’s frequency sensitivity range (audible frequency extremes differ by 10^3 ), consider a speedometer with a similar speed range. If the speedometer’s maximum speed reading is 90.0 mi/h, what is the smallest finite speed that it could register?
- (a) To appreciate the human ear’s twelve order of magnitude (1012) span from barely audible to the pain threshold, consider the following. Suppose an equivalently dynamic instrument were designed to measure distances. Taking the lower limit of the instrument to be 1.00 mm, what would be the largest distance measurable? (b) To provide a perspective for the human ear’s frequency sensitivity range (audible frequency extremes differ by 103 ), consider a speedometer with a similar speed range. If the speedometer’s maximum speed reading is 90.0 mi/h, what is the smallest finite speed that it could register?A 75-kW radio station broadcasts its signal uniformly in all directions, What is the average intensity of its signal at a distance of 250 m from the antenna?Determine the frequency response [M(w) and (w)] for an instrument having a time constant of 10 ms. Estimate the instrument's usable frequency range to keep its dynamic error within 10%.