In Figure below all fluids are at 20 deg.C. Determine pressure at point B, if pressure at point A is 150 kPa and weight of air is neglected. Use the table below for the densities at 20 deg.C. Liquid P. kg/m Kerosene - Ammonia 608 Benzene 881 Air Carbon tetrachloride 1590 Benzene Ethanol 789 Ethylene glycol 1117 A 40 cm 9 cm Freon 12 1327 20 cm Gasoline 680 14 cm Glycerin Kerosene 1260 8 cm 804 Mercury- -Water Mercury Methanol 13,550 791 SAE 1OW oil 870 SAE 10W30 oil SAE 30W oil SAE SOW oil 876 891 902 Water 998 Seawater (30%e) 1025

Joe takes his little brother Andy down the the playground for an afternoon out. Andy would like to ride the seesaw, but the difference in their sizes, Joe weights 160lbs and Andy weighs 641lbs, makes this difficult. Joe sees a solution from his engineering class and moves the fulcrum from the middle to a new place. The seesaw is 3.5m long. After Joe moved the fulcrum how long was the seesaw on Joe's side?

2.7 Calculate the total equivalent length of 1-in. wrought iron pipe that would produce a pressure drop of 70 kPa due to fluid friction, for a fluid flowing at a rate of 0.05 kg/sec, a viscosity of 2 cP, and density of 1000 kg/m³. A solution of ethanol is pumped to a vessel 25 m above a reference level through a 25-mm inside diameter steel pipe at a rate of 10 m³/hr. The length of pipe is 30 m and contains 2 elbows with friction equivalent to 20 diameters each. Compute the power requirement of the pump. Solution properties include density of 975 kg/m² and viscosity of 4x104 Pa.s. 2.8 A capillary-tube viscometer is being selected to measure viscosity of a liquid food. The maximum viscosity to be measured will be 230 cP and the maximum flow rate that can be measured accurately is 0.015 kg/min. If the tube length is 10 cm and a maximum pressure of 25 Pa can be measured, determine the tube diameter to be used. The density of the product is 1000 kg/m³. 2.9

After years of asking, you finally were allowed to go on a joy ride in your uncle’s 1956 Mercedes-Benz 300 SL. A notable feature of this vehicle is the gullwing door design that opens from a hinge at the top of the car. Unfortunately, you are having so much fun driving the car that you end up submerged in a fresh water lake. You sink to the bottom of the lake, which has a depth of 10 m. For the sake of simplicity, you can model the door as a 1 m × 1 m square plate, inclined at 45° relative to the floor of the lake. Neglect the weight of the door and friction in the hinge. How much force will be required to open the door, assuming you push from its geometric center?