Aspherical shell of radius r centered at the origin carries a uniform surface charge density σ, corresponding to a total charge q 4π r2σ. for a point at distance z from its center, calculate the electric field strength. note: you must treat the two cases, z r separately. it may be to use the law of cosines to define the separation of source and field points, s = v 2 : 2 rzoost. you might express the answers in terins of q are the results what you expected?

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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

it's a b and