A log has a length of 1.0 m, a radius of 0.5 m, and a mass of 50 kg. If the density of water is 1.0 g/cm3, how much is the minimum amount of mass that must be added in order to cause the log to sink? a.
690 kg
c.
780 kg
b.
740 kg
d.
810 kg

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