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I got parts A and B correct, but my answer for part C is wrong. Need help with part C pls

I got parts A and B correct, but my answer for part C is wrong. Need help with part C pls

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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I got parts A and B correct, but my answer for part C is wrong. Need help with part C pls.

Constants I Periodic Table A motion sensor can accurately measure the distance d to an object repeatedly via the sonar technique. (Older autofocusing cameras determine the distance by emitting a pulse of very high frequency (ultrasonic) sound that travels to the object being photographed, and include a sensor that detects the returning reflected sound, as shown in the figure.) (Figure 1) A short ultrasonic pulse is emitted and reflects from any objects it encounters, creating echo pulses upon their arrival back at the sensor. The sensor measures the time interval t between the emission of the original pulse and the arrival of the Submit Previous Answers Correct Part C first echo. Assume that during a lab period the room's temperature increases from 20°C to 24 °C. What percent error will this introduce into the motion sensor's distance measurements? Figure 1 of 1 Express your answer using two significant figures. ? Autofocusing camera Ad 3.4 % d Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Provide Feedback Next
Transcribed Image Text:Constants I Periodic Table A motion sensor can accurately measure the distance d to an object repeatedly via the sonar technique. (Older autofocusing cameras determine the distance by emitting a pulse of very high frequency (ultrasonic) sound that travels to the object being photographed, and include a sensor that detects the returning reflected sound, as shown in the figure.) (Figure 1) A short ultrasonic pulse is emitted and reflects from any objects it encounters, creating echo pulses upon their arrival back at the sensor. The sensor measures the time interval t between the emission of the original pulse and the arrival of the Submit Previous Answers Correct Part C first echo. Assume that during a lab period the room's temperature increases from 20°C to 24 °C. What percent error will this introduce into the motion sensor's distance measurements? Figure 1 of 1 Express your answer using two significant figures. ? Autofocusing camera Ad 3.4 % d Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Provide Feedback Next
Constants I Periodic Table A motion sensor can accurately measure the distance d to an object repeatedly via the sonar technique. (Older autofocusing cameras determine the distance by emitting a pulse of very high frequency (ultrasonic) sound that travels to the object being photographed, and include a sensor that detects the returning reflected sound, as shown in the figure.) (Figure 1) A short ultrasonic pulse is emitted and reflects from any objects it encounters, creating echo pulses upon their arrival back at the sensor. The sensor measures the time interval t between the emission of the original pulse and the arrival of the first echo. Part A The smallest time interval t that can be measured with high precision is 1.2 ms . What is the smallest distance (at 20 °C) that can be measured with the motion sensor? Express your answer to two significant figures and include the appropriate units. dmin = 0.21 m Submit Previous Answers Figure 1 of 1 Correct Part B Аutofocusing сатera If the motion sensor makes 13 distance measurements every second (that is, it emits 13 sound pulses per second at evenly spaced time intervals), the measurement of t must be completed within the time interval between the emissions of successive pulses. What is the largest distance (at 20° C) that can be measured with the motion sensor? Express your answer to two significant figures and include the appropriate units. dmax = 13 m Submit Previous Answers Correct
Transcribed Image Text:Constants I Periodic Table A motion sensor can accurately measure the distance d to an object repeatedly via the sonar technique. (Older autofocusing cameras determine the distance by emitting a pulse of very high frequency (ultrasonic) sound that travels to the object being photographed, and include a sensor that detects the returning reflected sound, as shown in the figure.) (Figure 1) A short ultrasonic pulse is emitted and reflects from any objects it encounters, creating echo pulses upon their arrival back at the sensor. The sensor measures the time interval t between the emission of the original pulse and the arrival of the first echo. Part A The smallest time interval t that can be measured with high precision is 1.2 ms . What is the smallest distance (at 20 °C) that can be measured with the motion sensor? Express your answer to two significant figures and include the appropriate units. dmin = 0.21 m Submit Previous Answers Figure 1 of 1 Correct Part B Аutofocusing сатera If the motion sensor makes 13 distance measurements every second (that is, it emits 13 sound pulses per second at evenly spaced time intervals), the measurement of t must be completed within the time interval between the emissions of successive pulses. What is the largest distance (at 20° C) that can be measured with the motion sensor? Express your answer to two significant figures and include the appropriate units. dmax = 13 m Submit Previous Answers Correct
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