Problem 13. (Mixed closed tube) A curved tube, which is open to the atmosphere on one end and closed on the other, is filled with both water (density pw) and oil (density pa = 900 kg/m3). The two liquids do not mix. The height of the oil above the point where the two liquids meet is 75 cm, while the height of the closed end of the tube above this point is 25 cm. h=75cm Pw hunthun- A. What is the gauge pressure of the oil at the point A? Provide your answer in Pa. 4500 1points ' ' QUESTION 24 B. What is the gauge pressure at the point p1? Provide your answer in Pa. 6750 B. What is the gauge pressure in the water at the hole on the side where the water is flowing out? Give your answer in units of atm. 1.00968 1 points QUESTION 29 C. Solve for the speed 12 that the water is exiting the side ofthe container. Give your answer in m/s. Problem 7. (Manometer and Barometer) We are trying to measure the absolute pressure of a gas. The density of mercury is 13.6 g/cm3. A. We first use a manometer to measure the gauge pressure of the gas. The tube to the right is open to the atmosphere, and the liquid in the tube is mercury. What is the gauge pressure of the gas (assuming the atmosphere is at a pressure of 1 atm). Give your answer in kPa. Problem 13: Identifying the Contact Angle A. In the figures below, beads of liquid are at rest on a surface. In which of the three images is the contact angle less than 90"? (Select all that apply.) O The one on the left. 0 The one in the middle. C) The one on the right. B. In the image to the right a liquid is adhering to a vertical metal bar. Is the contact angle for the liquid greater or less than 90? 0 Greater than. 0 Less than. QUESTION 24 B. What is the gauge pressure at the point p1? Provide your answer in Pa. 6750 1 points QUESTION 25 C. What is the gauge pressure at the height p2? Provide your answer in Pa. : 1 points Save Answer QUESTION 26 D. What is the gauge pressure of the water at the point 19;, at the top of the closed end of the tube? Provide your answer in Pa. : Problem 14. (Water flowing out the side) Consider the cylindrical container shown to the right, filled with water, which has a small hole at the side. The cylinder has a diameter of d = 8 cm, a height ofH = 40 cm, and the whole is a distance of h = 10 cm from the top of the water in the container. The hole where the water is exiting has an area of A = 16 cm2. The water exits the hole at an unknown constant speed 17. A. In terms of the diameter of the container (1, the area of the hole A, and the speed of the water exiting the hole 1:, solve algebraically for the speed at which the water line at the top of the container is moving downward (call this vtop). 0 Wrap: %V O Vtop::V O vtop=$v O vtop=%v 0 vtop= 4A v C. In the image to the right, a liquid is in a tube. Is the contact angle for the liquid greater or less than 90"? 0 Greater than. 0 Less than. B. The weather is a little wacky, so we are not condent that the atmospheric pressure is exactly 1 atm. We use a barometer to measure the absolute pressure of the atmosphere - sure enough, it well off from 1 atm. We measure that the height of mercury in the barometer is .81 m. What is the atmospheric pressure in kPa? C. Given the actual atmospheric pressure determined in part (B), what is the actual absolute pressure in the gas in part (A)? Give your answer in kPa. QUESTION 25 C. What is the gauge pressure at the height 3);? Provide your answer in Pa. E 1 points I QUESTION 26 D. What is the gauge pressure of the water at the point p; at the top of the closed end of the tube? Provide your answer in Pa. E Problem 3. (Fluid flow in and out) Water runs through a pipe of cross-sectional area 0.2 m2 with a velocity of 6 m/s into a water tank. There are three tubes flowing out of the tank. The flow rate out tube 1 is 0.3 m3/s, and the flow rate out tube 2 is 0.5 m3/s. A. What is the flow rate out tube 3? Give your answer in units of m3/s. : 1 points Save Answer QUESTION 4 B. If the water exiting through tube 3 has a velocity of 20 m/s, what is the cross-sectional area of tube 3? Give your answer in units of m2. Problem 13. (Mixed closed tube) A curved tube, which is open to the atmosphere on one end and closed on the other, is lled with both water (density pw) and oil (density pa = 900 kg/m3). The two liquids do not mix. The height of the oil above the point where the two liquids meet is 75 cm, while the height of the closed end of the tube above this point is 25 cm. h=75cm Pw A. What is the gauge pressure of the oil at the point A? Provide your answer in Pa. 4500 1 points QUESTION 24 B. What is the gauge pressure at the point p1? Provide your answer in Pa. 6750