Please answer those questions

PHY232 Revision problems on surface tension and viscosity Q1. The radii of the two capillary tubes ri = 0.2 mm and r2 - 0.1mm. When the capillary tubes are immersed in a liquid of density p = 1000 kg/m' (angle of contact is 09), the level difference of liquid in two capillary tubes was found to be about 7.5 cm. i. Provide a labelled sketch showing the differences in the meniscus formed ii. Find out the surface tension (7) of the liquid. Q2. Two soap bubbles are floating in air and the merge such that the larger bubble is inflated by the smaller until they form a single bigger bubble. (Assume no air loss during merging). Determine the gauge pressure inside: (a) a soap bubble with a 3.0 cm radius, (b) a 4.5 cm radius soap bubble, (c) the single bubble they form as a result of merging. Q3. Engine oil (n = 0.2 Pa.s) passes through a fine 2.00-mm-diameter tube that is 15 cm'long. What pressure difference is needed to maintain a flow rate of 6.2 ml/min? Q4. A patient is to be given a blood transfusion. The blood is to flow through a tube from a raised bottle to a needle inserted in the vein. The inside diameter of the 25 mm long needle is 0.50 mm and the required flow rate is 2.2 cm' of blood per minute. How high should the bottle be placed above the needle? Obtain p of blood and n from tables. Assume the blood pressure is 78 torr above the atmospheric pressure. 25. i . Calculate the flow rate for a fluid passing through a tube of diameter 0.4 m at a velocity of 80 m/s. ii. Express your answer litres/min. iii. what would happen to the flow rate if the radius is doubled by 2 and velocity remains constant? Q6. Water moves through a constricted pipe in steady, ideal flow. At the lower point, the pressure P2 = 1.75 * 10* Pa and the pipe diameter is 6.00 cm. At another point y = 0.25 m higher, the pressure P1 = 1.20 * 104 Pa and the pipe diameter is 3.00 cm. a) provide a well labelled sketch and 1 | Page