The value of the poisson bracket [a 7,6.p], where al and b are constant vectors, is (a) a 6 (b) a -6 , (c) à +b (d) 3.6

the correct choice is a .

do not post any more test or exam questions on

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

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..