21. When a small external field H is applied, domains parallel to the external field start to grow. 22. The protein or membrane environment could respond to an external field in a number of different ways. 23. As the amount of current is increased in relation to the external field , these instabilities become uncontrollable. 24. The above may be read as implying that the LS-coupling is completely broken by the external field . 25. The incompressible Navier Stokes equations with conservative external field is the "'fundamental equation of hydraulics " '. 26. When a small external field H is applied, domains parallel to the external field start to grow. 27. Euler equations in the Froude limit ( no external field ) are named free equations and are conservative. 28. A stronger version with very little external field involves using a " k " = 3 Halbach cylinder. 29. A permanent magnet in such a field rotates so as to maintain its alignment with the external field . 30. The resonant frequency of a film with parallel applied external field B is given by the Kittel formula: