FIGURE 15-3
-The U-tube shown in Figure 15-3 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?

Question

FIGURE 15-3 FIGURE 15-3 -The U-tube shown in Figure 15-3 contains mercury with a density of 13,600 kg/m<sup>3</sup>. 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

FIGURE 15-3 -The U-tube shown in Figure 15-3 contains mercury with a density of 13,600 kg/m<sup>3</sup>. 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

-The U-tube shown in Figure 15-3 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?

Quizplus · Accepted Answer

The gauge pressure at point A in the boiler can be calculated using the formula P = rho*g*h, where rho is the density, g is the acceleration due to gravity and h is the height of the mercury column. Since the U-tube is open at one end, the height of the mercury column is the same on both sides. Therefore, we only need to consider the difference in height between the mercury column and the water level in the boiler, which is 0.035 m. Using the given values, we get P = (13600 kg/m^3 * 9.81 m/s^2) * 0.035 m = 4.41 kPa. Therefore, the correct answer is B.

FIGURE 15-3 -The U-Tube Shown in Figure 15-3 Contains Mercury with a Mercury