Physics, 07.12.2019 07:31 hudsonlilliana
The motion detector used in a physics lab sends and receives 39 khz ultrasonic pulses. a pulse goes out, reflects off the object being measured, and returns to the detector. the lab temperature is 20 c. a) what is the wavelength of the waves emitted by the motion detector? ) how long does it take for a pulse that reflects off an object 2.2 {\rm m} away to make a round trip? ms
Answers: 3
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The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2
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The motion detector used in a physics lab sends and receives 39 khz ultrasonic pulses. a pulse goes...
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