The cunninghams are moving across the country. mr. cunningham leaves 2.5 hours before mrs. cunningham. if he averages 40 mph and she averages 65 mph, how long will it take mrs. cunningham to overtake mr. cunningham?

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.

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

You can decrease the resistance of a length of wire by