A piano tuner creates an 880.0 Hz tone. When he plucks a piano string, the two
waves create a beat frequency of
5.0 Hz. The string could have two
possible frequencies. What is the
highest value it could have?
(Speed of sound = 343 m/s)
(Unit = Hz)

newton's first law of motion

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j