A66-mh solenoid inductor is wound on a form 0.80 m in length and 0.10 m in diameter. a coil is tightly wound around the solenoid at its center. the coil resistance is 7.7 ohms. the mutual inductance of the coil and solenoid is 34 µh. at a given instant, the current in the solenoid is 810 ma, and is decreasing at the rate of 2.5 a/s.

a) the number of turns in the winding of the solenoid is?
b) at the given instant, the induced emf in the solenoid is?
c) at the given instant, the magnetic energy of the solenoid, in

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The correct answer is waves

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.