By J. Welty, et. al.,

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47 N/m. 55 mm. Contact angles are 08 for water and 1308 for mercury. 30 Determine the diameter of the glass tube necessary to keep the capillary-height change of water at 308C less than 1 mm. Chapter 2 Fluid Statics The definition of a fluid variable at a point was considered in Chapter 1. In this chapter, the point-to-point variation of a particular variable, pressure, will be considered for the special case of a fluid at rest. A frequently encountered static situation exists for a fluid that is stationary on Earth’s surface.

15' A 10 in. 16 The car shown in the figure is accelerated to the right at a uniform rate. What way will the balloon move relative to the car? 20 A circular log of radius r is to be used as a barrier as shown in the figure below. If the point of contact is at O, determine the required density of the log. 17 The tank is accelerated upward at a uniform rate. Does the manometer level go up or down? 21 A rectangular block of concrete 3 ft  3ft  6 in. has its 6in. side half buried at the bottom of a lake 23 ft deep.

The right-hand edge of the block is flush with the water. 26 The figure below shows an open triangular channel in which the two sides, AB and AC, are held together by cables, spaced 1 m apart, between B and C. Determine the cable tension. Cable B C Water A 6m Chapter 3 Description of a Fluid in Motion The development of an analytical description of fluid flow is based upon the expression of the physical laws related to fluid flow in a suitable mathematical form. Accordingly, we shall present the pertinent physical laws and discuss the methods used to describe a fluid in motion.

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