An ultrasound doppler meter is used to detect motion for an alarm system. The unit emits an ultrasound signal and its echo is detected back at the same unit. If the unit emits a frequency of 100 MHz and is only able to detect a change in frequency of the reflected sound greater than 8.0 kHz, what is the maximum speed that an intruder can travel at relative to the unit whilst remaining undetected? Take the speed of sound in air to be 343 m/s. 6.0 cm/s 2.0 cm/s 1.0 cm/s 12cm/s 1.4 cm/s 2.7 cm/s agonal crystalline growth in the s from the normal of the first icular to the plane of the page he refractive index of the efractive index of the ng ray most closely represents
An ultrasound doppler meter is used to detect motion for an alarm system. The unit emits an ultrasound signal and its echo is detected back at the same unit. If the unit emits a frequency of 100 MHz and is only able to detect a change in frequency of the reflected sound greater than 8.0 kHz, what is the maximum speed that an intruder can travel at relative to the unit whilst remaining undetected? Take the speed of sound in air to be 343 m/s. 6.0 cm/s 2.0 cm/s 1.0 cm/s 12cm/s 1.4 cm/s 2.7 cm/s agonal crystalline growth in the s from the normal of the first icular to the plane of the page he refractive index of the efractive index of the ng ray most closely represents
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter16: Waves
Section: Chapter Questions
Problem 121AP: A sunbather stands waist deep in the ocean and observes that six crests of periodic surface waves...
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