Two coaxial circular coils of radius r = 15 cm, each carrying 4.0 a in the same direction, are positioned a distance d = 20 cm apart, as shown in the figure. calculate the magnitude of the magnetic field halfway between the coils along the line connecting their centers.

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.

How much heat is needed to raise the temperature of 5g of water by 16°c?