Wo small pith balls, each carrying a charge q, are attached to the ends of a light rod of length d, which is suspended from the ceiling by a thin torsion- free fiber. There is a uniform magnetic field B, poi If the magnetic field is turned off, which of the following describes what happened to the system? nting straight down, in the cylindrical region of radius R around the fiber. The system is initially at rest TrueIt does not rotate because to do so would violate conservation of angular momentum FaiseIt rotates with angular momentum qBd/4 True It does not move because magnetic forces do no work Fase It rotates with angular momentum qBR True It rotates with angular momentum qBRd/2

the answer to this question is 60 n

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

i dont have a visual in front of me, but i can you reason to try to get the right one. the graph should look like this, 0 to 6 there is a spike, 12 to 14 there should be a very low point. slight increase in the graph at 12 to 14, and flat 14 to 18

explanation: