Asked by Lisa
                Is the surface of water truly a node? Why?
An airplane mechanic (standing still) notices that the sound from a twin-engine aircraft rapidly varies in loudness when both engines are running.
What could be causing the variation back and forth between loud and soft?
            
        An airplane mechanic (standing still) notices that the sound from a twin-engine aircraft rapidly varies in loudness when both engines are running.
What could be causing the variation back and forth between loud and soft?
Answers
                    Answered by
            Lisa
            
    Is the surface of water truly a node? Explain.
An airplane mechanic (standing still) notices that the sound from a twin-engine aircraft rapidly varies in loudness when both engines are running.
What could be causing the variation back and forth between loud and soft?
    
An airplane mechanic (standing still) notices that the sound from a twin-engine aircraft rapidly varies in loudness when both engines are running.
What could be causing the variation back and forth between loud and soft?
                    Answered by
            sonia
            
    i am having trouble getting this answer. Help
    
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