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A Metra train is moving at a speed of 25.0 m/s. As it approaches astation its horn emits a sound of frequency 750. Hz.
a) Calculate the frequency detected by a personstanding still at the station. (Use 345 m/s for the speed ofsound.)
b) As the train moves away, still blowing its horn at the samefrequency as before, the observer hears a frequency of 717 Hz.Calculate the speed of the train.
A +19nC charge is located at the origin. What is the electric field at the position (x1,y1)=(5.0cm,0cm)? Write electric field vector in component form
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A Hall probe uses the Hall effect to measure the size of magnetic fields - it does this by measuring the potential difference across the electric field created by the displacement of charge
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