An infinite solid cylindrical conductor of radius centered on the z-axis carries a current . The current is uniformly distributed over its cross section and is directed out of the page ( z direction). A coaxial infinite, thin cylindrical conducting shell of radius carries a current into the page (-z direction). 1. What is the magnitude of the B-field inside the inner cylinder at a radius of from the central axis

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

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2