Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259696534
Author: Yunus A. Cengel Dr., John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 6, Problem 15CP
Describe body forces and surface forces, and explain how the net force acting 01) a control volume is determined. Is fluid weight a body force or surface force? How about pressure?
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Chapter 6 Solutions
Fluid Mechanics: Fundamentals and Applications
Ch. 6 - Express Newton’s second law of motion for rotating...Ch. 6 - Express Newton’s first, second, and third laws.Ch. 6 - Is momentum a vector? If so, in what direction...Ch. 6 - Express the conservation of momentum principle....Ch. 6 - How do surface forces arise in the momentum...Ch. 6 - Explain the importance of the Reynolds transport...Ch. 6 - What is the importance of the momentum-flux...Ch. 6 - Write the momentum equation for steady...Ch. 6 - In the application of the momentum equation,...Ch. 6 - Two firefighters are fighting a fire with...
Ch. 6 - A rocket in space (no friction or resistance to...Ch. 6 - Describe in terms of momentum and airflow how a...Ch. 6 - Does it take more, equal, or less power for a...Ch. 6 - In a given location, would a helicopter require...Ch. 6 - Describe body forces and surface forces, and...Ch. 6 - A constant-velocity horizontal water jet from a...Ch. 6 - A horizontal water jet of constant velocity V from...Ch. 6 - A horizontal water jet from a nozzle of constant...Ch. 6 - A 2.5-cm-diameter horizontal water jet with a...Ch. 6 - A 90 elbow in a horizontal pipe is used to direct...Ch. 6 - Repeat Prob. 6-20 for the case of another...Ch. 6 - A horizontal water jet impinges against a vertical...Ch. 6 - Water enters a 7-cm-diameter pipe steadily with a...Ch. 6 - A reducing elbow in a horizontal pipe is used to...Ch. 6 - Repeat Prob. 6-24 for the case of = 125°.Ch. 6 - A 100-ft3/s water jet is moving in the positive...Ch. 6 - Reconsider Prob. 6-26E. Using appropriate...Ch. 6 - Commercially available large wind turbines have...Ch. 6 - A fan with 24-in-diameter blades moves 2000 cfm...Ch. 6 - A 3-in-diameter horizontal jet of water, with...Ch. 6 - Firefighters are holding a nozzle at the end of a...Ch. 6 - A 5-cm-diameter horizontal jet of water with a...Ch. 6 - Prob. 33PCh. 6 - A 3-in-diameter horizontal water jet having a...Ch. 6 - An unloaded helicopter of mass 12,000 kg hovers at...Ch. 6 - Prob. 36PCh. 6 - Water is flowing through a 10-cm-diameter water...Ch. 6 - Water flowing in a horizontal 25-cm-diameter pipe...Ch. 6 - Prob. 39PCh. 6 - Water enters a centrifugal pump axially at...Ch. 6 - An incompressible fluid of density and viscosity ...Ch. 6 - Consider the curved duct of Prob. 6-41, except...Ch. 6 - As a follow-up to Prob. 6-41, it turns out that...Ch. 6 - Prob. 44PCh. 6 - The weight of a water tank open to the atmosphere...Ch. 6 - A sluice gate, which controls flow rate in a...Ch. 6 - A room is to be ventilated using a centrifugal...Ch. 6 - How is the angular momentum equation obtained from...Ch. 6 - Prob. 49CPCh. 6 - Prob. 50CPCh. 6 - Prob. 51CPCh. 6 - A large lawn sprinkler with two identical arms is...Ch. 6 - Prob. 53EPCh. 6 - The impeller of a centrifugal pump has inner and...Ch. 6 - Water is flowing through a 15-cm-diameter pipe...Ch. 6 - Prob. 56PCh. 6 - Repeat Prob. 6-56 for a water flow rate of 60 L/s.Ch. 6 - Prob. 58PCh. 6 - Water enters the impeller of a centrifugal pump...Ch. 6 - A lawn sprinkler with three identical antis is...Ch. 6 - Prob. 62PCh. 6 - The impeller of a centrifugal blower has a radius...Ch. 6 - An 8-cm-diameter horizontal water jet having a...Ch. 6 - Water flowing steadily at a rate of 0.16 m3/s is...Ch. 6 - Repeat Prob. 6-66 by taking into consideration the...Ch. 6 - A 16-cm diameter horizontal water jet with a speed...Ch. 6 - Water enters vertically and steadily at a rate of...Ch. 6 - Repeal Prob. 6-69 for the case of unequal anus-the...Ch. 6 - Prob. 71PCh. 6 - Prob. 72PCh. 6 - A spacecraft cruising in space at a constant...Ch. 6 - A 60-kg ice skater is standing on ice with ice...Ch. 6 - A 5-cm-diameter horizontal jet of water, with...Ch. 6 - Water is flowing into and discharging from a pipe...Ch. 6 - Indiana Jones needs So ascend a 10-m-high...Ch. 6 - Prob. 79EPCh. 6 - A walnut with a mass of 50 g requires a force of...Ch. 6 - Prob. 81PCh. 6 - Prob. 82PCh. 6 - A horizontal water jet of constant velocity V...Ch. 6 - Show that the force exerted by a liquid jet on a...Ch. 6 - Prob. 85PCh. 6 - Prob. 86PCh. 6 - Water enters a mixed flow pump axially at a rate...Ch. 6 - Prob. 88PCh. 6 - Water enters a two-armed lawn sprinkler along the...Ch. 6 - Prob. 91PCh. 6 - Prob. 92PCh. 6 - Prob. 93PCh. 6 - Prob. 94PCh. 6 - A water jet strikes a moving plate at velocity...Ch. 6 - Water flows at mass flow rate m through a 90°...Ch. 6 - Prob. 97PCh. 6 - Water shoots out of a Iar2e tank sitting a cart...Ch. 6 - Prob. 99PCh. 6 - Prob. 100PCh. 6 - Prob. 101PCh. 6 - Consider water flow through a horizontal, short...Ch. 6 - Consider water flow through a horizontal. short...Ch. 6 - Prob. 104PCh. 6 - Prob. 105PCh. 6 - Prob. 106PCh. 6 - The velocity of wind at a wind turbine is measured...Ch. 6 - The ve1ocity of wind at a wind turbine is measured...Ch. 6 - Prob. 109PCh. 6 - Prob. 110PCh. 6 - Prob. 111PCh. 6 - Consider the impeller of a centrifugal pump with a...Ch. 6 - Prob. 113PCh. 6 - Prob. 114P
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- Consider a cubical water tank with a side length of 3 m. The tank is half filled with water, and is open to the atmosphere with a pressure of 100 kPa. Now, A truck carrying this tank accelerated at a rate of 5 m/s^2. The maximum pressure in kPA in the water is a.129 b.122 c.115 d.137arrow_forwardAir P= 50 kPa Q2) A pressurized tank of square cross section area of 2 m x 2 m is filled with air and water as shown. The air is at pressure of 50 kPa (gage). An opening gate with a rectangular cross section is held closed by a lever 1 m long attached to a buoyant cylinder. The cylinder is 25 cm in diameter and mass of 30 kg. The gate is attached to a horizontal shaft so it can pivot about its center. The width of the gate is 0.5 m. The chain and lever attached to the gate have negligible weight. The water depth above the top of the gate is 10 m. 25 cm Water 15 m 10 m a) Obtain the hydrostatic force acting on the gate. b) Locate the corresponding center of pressure. c) Find the length of the chain such that the gate is just on the verge of opening d) Suggest modifications to be done for the eylindrical buoyant in order to reduce the length of the chain. pivot 1m 2 marrow_forward(b) A piston and water are accelerated upwards with an acceleration of 0.5g as shown in Fig.1. Determine the pressure at a depth of 1 m in the water column. (pw=10³ kg/m³) 1,5 m Pul! 201 10.4 mp Fig.1 ↑azarrow_forward
- A vessel cylindrical in shape and closed at the top and bottom is 200 mm in diameter and 0.15 m in height. The vessel is completely filled with water. If it is rotated about its vertical axis with a speed of 200 r.p.m., what is the total pressure force (in N) exerted by water at bottom of the vessel? CHOICES: a.7.09 b.10.35 c.80.6 d.34.4arrow_forwardAir tank filled with air (air gas constant 287 Jag K, density of 1.2 kg/m), the air temperature is 20 C Find the force F (N). The oil specifie gravity S- 0.8. Neglect the weights of the piston. F 10 cm diameter Vertical 2m air r -2.2 marrow_forwardConsider a cubical water tank with a side length of 3.5 m. The tank is half filled with water, and is open to the atmosphere. Now, a truck carrying this tank is accelerated at a rate of 7 m/s^2 on a flat road. The maximum vertical rise (in meters) of free surface of the water is ?"arrow_forward
- In Fig.the tank contains water and immiscibleoil at 20 ° C. What is h in cm if the density of the oil is898 kg/m 3 ?arrow_forwardFor a liquid with the contact angle of 53.6 degrees and surface tension of 0.075 N/m, capillary rise is 2.50 m. What is the expected capillary rise in meters if the liquid is replaced with another with a contact angle of 12.7 degrees and a similar surface tension? (answer should be accurate to 2 decimal places) Answer:arrow_forwardRound off at the final answer only! As illustrated, the semicircular gate AB is utilized to store kerosene. In meters, how far is the center of pressure from A? Kerosene SG= 0.82 5 m 3 m A B -P Gate: Side viewarrow_forward
- Example: Pressure in A Decelerating Tank of Liquid The tank on a trailer truck is filled completely with gasoline, which has a specific weight of 42 lbf/ft³ (6.60 kN/m³). The truck is decelerating at a rate of 10 ft/s² (3.05 m/s²). (a) If the tank on the trailer is 20 ft (6.1 m) long and if the pressure at the top rear end of the tank is atmospheric, what is the pressure at the top front? (b) If the tank is 6 ft (1.83 m) high, what is the maximum pressure in the tank? Now if the tank is assumed to be opened find the following: If the tank on the trailer is 20 ft (6.1 m) long and 6 ft (1.83 m) high, what is the pressure at the top front and bottom rear? and what is the maximum pressure in the tank? The width of truck is 2 m. 20 ft 20 ftarrow_forwardA substance weighing 6 N and moving at 70 m/s enters a viscous liquid and comes to a hait before hitting the bottom. What is the increase in internal energy when the item and liquid are considered as a system?arrow_forwardExample: Pressure in A Decelerating Tank of Liquid The tank on a trailer truck is filled completely with gasoline, which has a specific weight of 42 lbf/ft³ (6.60 kN/m³). The truck is decelerating at a rate of 10 ft/s² (3.05 m/s²). (a) If the tank on the trailer is 20 ft (6.1 m) long and if the pressure at the top rear end of the tank is atmospheric, what is the pressure at the top front? (b) If the tank is 6 ft (1.83 m) high, what is the maximum pressure in the tank? Now if the tank is assumed to be opened find the following: If the tank on the trailer is 20 ft (6.1 m) long and 6 ft (1.83 m) high, what is the pressure at the top front and bottom rear? and what is the maximum pressure in the tank? The width of truck is 2 m. 2 1arrow_forward
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