sp06_fluid_problems - Fluids Fig 1 Fig 2 P1 Water and then...

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Fluids Fig. 1 Fig. 2 P1. Water and then oil (which don't mix) are poured into a U-shaped tube, open at both ends. They come to equilibrium as shown in Fig.1. What is the density of the oil? Ans. 2 2 A+>/< A+>/< 936 3 P2. A hydraulic press for compacting powderered samples has a large cylinder which is 10.0 cm in diameter, and a small cylinder with a diameter of 2.0 cm. A force of 300 N is applied to the small cylinder. The sample, which is placed on the large cylinder, has an area of 4.0 cm . What is the pressure on the sample? # d D F in Ans. "Þ)(&‚"! ( N m P3.* A cylindrical bucket of liquid density is rotated about its symmetry axis, which a b 3 is vertical. If the angular velocity is , show that the pressure at a distance r from the = rotation axis is T oeT  < 9 " # # # 3= where is the pressure at . T <oe! 9 P4. A spherically shaped balloon has a radius of 7.35 m, and is filled with helium (Fig.2). How large a cargo can it lift, assuming that the skin and structure of the balloon have a mass of 1000 kg? Neglect the buoyant force on the cargo volume itself.
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