2.壓力與剪應力在一維層流中，在x方向(水平方向)之關係為何？請利用Navier-Stokes方程式說明之。（25分）

4. What are the major differences (assumptions, terms in the equation) between the Bernoulli equation and the energy equation derived from the Reynolds transport theorem? Express the difference in their governing equation mathematically and explain its physical meanings.