2 Coulomb charged object is placed in an electric field and experiences a force of 10N. Find the strength of the electric field. a. 5 N/C
b. 20 N/C
c. 40 N/C
d. 200 N/C

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

the answer you are looking for is d. there are no holes for blood to enter or leave the system. your welcome