Ideal Gas Equation

According to Bernoulli’s principle, for a steady flow of an incompressible fluid, the sum of the pressure energy, kinetic energy, and potential energy per unit volume is constant. This can be expressed as: For horizontal flow (ignoring potential energy), the equation simplifies to: When the speed of air increases, the pressure decreases to maintain the constant value. From the figure, we see that as the air passes through the narrow part of the streamline (region 1), the speed of air increases, and the pressure decreases. In the wider part (region 2), the air speed is slower, and the pressure is higher.
Thus, and . Therefore, the correct answer is (E).