There are two competing links between locations a and b separated by 3 km. the first uses fiber of length 5 km over which the light signal propagates at 2/3 the speed of light. the transmission rate on the fiber link is 10 gbps. the second uses a utp cable of length 15 km over which the electrical signal propagates at 0.7 times the speed of light. the transmission rate is 100 kbps. if you wish transfer a 100 mbits file between a and b, which option would provide you the shortest overall delay? assume the overall delay includes only the transmission delay and the propagation delay.

when it gains or loses electrons

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

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