The plastic tube in Figure 2 has a cross-sectional area of 4.22 cm? The tube is filled with water until the short arm (of length d = 1.200 m) is full. Then the short arm is sealed and more water is gradually poured into the long arm. The seal will pop off when the force on it exceeds 7.00 N. The density of water is 998 kg/m' and the free-fall acceleration around the ground is 9.8 m/s? The atmospheric pressure is 1.013x105 pa. (a) What total height of water in the long arm will put the seal on the verge of popping? (b) At about half the total height obtained above, a ball containing gas was connected to the right side of the long arm as shown in Figure 3. If the seal pops off. what is the minimum pressure of the gas? L . d Figure 2 Figure 3