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A tuning fork of frequency 400 Hz is moved away from an observer and toward a flat wall with a speed of 2mps. What is the apparent frequency of the unreflected sound waves coming directly to the observer? Assume the speed of the sound in air to be 340 mps. * 398 Hz

A tuning fork of frequency 400 Hz is moved away from an observer and toward a flat wall with a speed of 2mps. What is the apparent frequency of the unreflected sound waves coming directly to the observer? Assume the speed of the sound in air to be 340 mps. * 398 Hz

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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A tuning fork of frequency 400 Hz is moved away from an observer and toward a flat wall with a speed of 2mps. What is the apparent frequency of the unreflected sound waves coming directly to the observer? Assume the speed of the sound in air to be 340 mps. * 398 Hz 370 Hz 319 Hz 341 Hz An electron gun shoots electrons at a metal plate that is 4mm away in vacuum. The plate is 5V lower in potential than the gun. How fast must the electrons be moving as they leave the gun if they are to reach the plate? * O 1.3 x 10^5 mps O 1.3 x 10^7 mps 1.3 x 10^8 mps O 1.3 x 10^6 mps
Transcribed Image Text:A tuning fork of frequency 400 Hz is moved away from an observer and toward a flat wall with a speed of 2mps. What is the apparent frequency of the unreflected sound waves coming directly to the observer? Assume the speed of the sound in air to be 340 mps. * 398 Hz 370 Hz 319 Hz 341 Hz An electron gun shoots electrons at a metal plate that is 4mm away in vacuum. The plate is 5V lower in potential than the gun. How fast must the electrons be moving as they leave the gun if they are to reach the plate? * O 1.3 x 10^5 mps O 1.3 x 10^7 mps 1.3 x 10^8 mps O 1.3 x 10^6 mps
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