PH 122 Lecture Notes - Potassium Channel, Mangiafuoco, Electric Dipole Moment
Document Summary
The electric potential energy of an electron increases when it is moved away from a positive charge. Breaking a hydrogen bond between two water molecules: 0. 24 ev. Energy released in metabolizing one molecular of atp: 0. 32 ev. Breaking the bond between atoms in a water molecule: 4. 7 ev. Charge on a capacitor with potential difference vc. 1 farad = 1 f = 1 c/v. Capacitance of a parallel-plate capacitor with plate area a, separation d. Electric potential energy of a capacitor with charge q and potential difference. The flash unit in a camera creates a very short but very bright flash: 105 w for a time of 10 s. The flash is produced by a 22 g capacitor. E = (100,000 w) (10 x 10-6 sec) 1. 0 j = (22 x 10-6 f) ( v)2. The positive nuclei shift very slightly in the direction of the field. The negative electrons shift very slightly in the direction opposite to the field.
