FIGURE 13-4 -The U-Tube Shown in Fig. 13-4 Contains Mercury with a Mercury

Multiple Choice

FIGURE 13-4
-The U-tube shown in Fig. 13-4 contains mercury with a density of 13,600 kg/m³. It is open on one end and the other end is connected to a boiler, which contains water at high pressure. The water from the boiler pushes directly on the mercury column. What is the gauge pressure at point A in the boiler?

A) 4.54 kPa
B) 4.41 kPa
C) 128 Pa
D) 441 Pa
E) 449 Pa