What type of circuit is illustrateda parallel circuit b series circuitc open circuitd short circuit

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in the collision? explain why or why not

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.