What is the time constant of a 9.0-nm-thick membrane surrounding a 0.040-mm-diameter spherical cell? assume the resistivity of the cell membrane as 3.6×107 ω⋅m and the dielectric constant is approximately 9.0.

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

answer( sicar );

access to city

explanation: