A circular coil with a diameter of 100 mm, which is at the same plane as the one of the sheet, conducts a current of 6A counterclockwise. The coil is immersed in a material of relative permeability of 2.5. Find the magnitude of the magnetic induction,

a) at the center of the coil and

b) 3 cm away in the center axis.

A10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead, which is much denser than aluminum. which one has the greater buoyant force on it? explain. b - the aluminum a) both have the same buoyant force. b) the aluminum c) the lead d) it cannot be determined without knowing their volumes.