The superheroine Xanaxa, with a mass of 60.1 kg, is in a hair–raising chase after the 74.5
kg archvillain Lexlax. She leaps from the ground to the top of a 175
m high building, then dives off and comes to rest at the bottom of a 18.5
m deep excavation, where she finds Lexlax and neutralizes him

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

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?

What’s #16 asking and how do i solve it?