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.

question1

1,000 tons

question2

3: 8

question 3

store d

step-by-step explanation:

radiation warms things up temp rises convection currents air circ windy weather

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop