P(2.3) 4. In Fig. P2.4 all fluids are at 20°C. Determine the pressure difference (Pa) between points A and B. 5. For the inverted manometer of Fig. P2.5, all fluids are at 20°C. If PB-PA-97 kPa, what must the height H be in cm? Mercury- Kerosine Benzene 20 cm 40 cm P(2.4) Water Meriam red oil. SG=0.827 19 cm 14 cm 2 Water 18 cm H Mercury A + 35 cm P(2.5) 6. Water flows upward in a pipe slanted at 30°, as in Fig. P2.6. the mercury manometer reads h = 12 cm. Both fluids are at 20°C. What is the pressure difference P1 P2 in the pipe? 7. Water flows downward in a pipe at 45°, as shown in Fig. P2.7. the pressure drop p₁-P2 is partly due to gravity and partly due to friction. The mercury manometer reads a 6-in height difference. What is the total pressure drop p₁ - P2 in lbf/in²? What is the pressure drop due to friction only between 1 and 2 in lbf/in²? 30° (D) P(2.6) Water 56 Flow •2 6 in Mercury P(2.7)