A model of a red blood cell portrays the cell as a spherical capacitor, a positively charged liquid sphere of surface area A separated from the surrounding negatively charged fluid by a membrane of thickness t. Tiny electrodes introduced into the interior of the cell show a potential difference of 100 mV across the membrane. The membrane's thickness is estimated to be 103 nm and has a dielectric constant of 5.00. If an average red blood cell has a mass of 1.00×10^−12 kg, estimate the volume of the cell and thus find its surface area. The density of blood is 1100 kg/m^3. .

i don't understand is there any other way you can rephrase it plz let me know in the comments and i will do it.

explanation:

battery with hi vtge high val resist in series

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