Two negative charges that are both -3.0 c push each other apart with a force of 19.2 n. how far apart are the two charges ?

The Coulomb's force acting between two charges is

where  is the Coulomb's constant, q1 and q2 the two charges, and r the distance between them.

Using , we can find the distance between the two charges when the force is F=19.2 N:

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.