Q7: An open tank contains water up to a depth of 2m and above it an oil of S.G 0.9 for a depth of 1m. Find the pressure at the interface of the two liquids, and the pressure at the bottom of the tank. Q8: An underground gasoline tank is accidentally opened during raining causing the water to seep in and occupying the bottom part of the tank as shown below. If the specific gravity for gasoline 0.68 , the gauge pressure at the of the gasoline and 46.5kPa. Calculate the pressure gauge at the interface Pascal and as a pressurater and the depth of water. Express the pressure in Q9: A hydraulic press has a ram of 30cm diameter and a plunger of 4.5cm diameter. Find the weight lifted by the hydraulic when the force applied at the plunger is 500N. Q10: In a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section, and a diameter of 10cm and pressure is 188kPa is transmitted by a liquid to a piston to lift a car weighing 13300N. what is the diameter of the piston that lift a car? And what is the force of small piston