physics question

1. Q 是heat
是first law of thermodynamics 中:
internal energy change = Q+W 的Q

2. q 是charge

eg. F=Bvq
( Magnetic Force on a moving charge= magnetic flux density x velocity o of charge particle x charge)

2008-05-14 10:48:53 補充：
First law of thermodynamics:
Q 是 system 所吸收的heat enrgyheat supplied to the system)
W 是外界向system 所做的功(work done on the system)