d d t ∂ ∂ T ∂ ∂ ω ω → → = ∂ ∂ T ∂ ∂ ω ω → → × × ω ω → → + ∂ ∂ T ∂ ∂ v → → × × v → → + Q → → h + Q → → , d d t ∂ ∂ T ∂ ∂ v → → = ∂ ∂ T ∂ ∂ v → → × × ω ω → → + F → → h + F → → , T = 1 2 ( ω ω → → T I ~ ~ ω ω → → + m v 2 ) Q → → h = − − ∫ ∫ p x → → × × n ^ ^ d σ σ , F → → h = − − ∫ ∫ p n ^ ^ d σ σ