La corda rappresentata in figura ha una massa di 80,0 g. Calcola quanto tempo impiega la perturbazione generata da Manuel, sulla sinistra, e raggiunge Patrizia, sulla destra

a and c

explanation:

both a and c are correct answers to my knowledge, it's been a bit since i've done anything related to magnetic fields, but it should be right.

t.                 w               e                 n                   t                 y                 c             h               a           r           a               c                 t             e             r             s        

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