A long, straight wire of radius R carries a steady current I thatis uniformly distributed through the cross section of the wire.

a). Using Ampere's Law, show the derivation of the equationfor the magnetic field in the region r > R.
b). And in the region r < R.

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m. the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?