the father of America
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Who is referred to as the father of America because of his Christian influence upon America?
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A massive amount of the wealth of America
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A massive amount of the wealth of America (and indeed the entire world) has, over the past couple of centuries, been consolidated in the hands of large, multinational corporations.Is this a good thing?
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What happens to the sound as the train passes the observer?
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As a train is moving towards an observer, its speed doubles. Does this speed change/impact the frequency of the sound of the whistle from the train? How? What happens to the sound as the train passes the observer?
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What is the frequency (in Hz) of the tone being emitted? (Assume air temperature to be 20°C.)
Question
A person stands directly in front of two speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 6.15 m from one of the speakers and 6.19 m from the other. What is the frequency (in Hz) of the tone being emitted? (Assume air temperature to be 20°C.)
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