Explain how Newton’s second and third laws are used to calculate the force needed to hold up a 5.670 g coin and keep it from falling. (g = 9.80 m/s2). Calculate the force (In Newtons) as part of your answer. Show your work!

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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.