The answer to: what variable affects the natural frequency of an organ pipe? a) pipe width b) pipe length c) pipe area d) pipe use is pipe length

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.