Use the mouse to move the wood block in and out of the water and watch what happens to the liquid level (boxed in yellow in the picture) and how the buoyant force changes (pink arrow that appears on the box when it is in the water). when moving the wood block deeper into the water the water level increased. what happened to the buoyant force?

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?