Three charges q, -4q and 2q are placed at the three vertices of an equilateral
triangle of side 10 cm. What is the Potential energy of this system, if q =150
nC in a) J b) eV?

The upward force acting on the wing of a airplane in flight is known as the "lift" force. (d)

Ive never heard of creep meters

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.