A water jet strikes a block and is then deflected 90 (vertically) with respect to the...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
A water jet strikes a block and is then deflected 90° (vertically) with respect to the block. The block is initially at rest and is accelerated by the water jet. The mass of the block is 100 kg, which is assumed to be much greater than the mass of the water in the jet (only include the mass and velocity of the block in the momentum accumulation term of the momentum conservation equation). If the volume flow rate from the jet is 0.045 m³/s and the jet diameter is 5cm, find the time required for the block to get to a speed 50%, 75%, 90%, 95% of the jet speed. Neglect friction between the block and the surface it slides on. Flow a. S=0.5 b. S=2 1. How does the time required for the block to achieve a speed 50% of the jet speed change if the water is replaced with a fluid having a specific gravity of: a. b. 2 2. How does the time required for the block to achieve a speed 50% of the jet speed change if the water is deflected by: 45° 135° C. 180° (full reverse) Vb with respect to the block? 3. If the jet is driven upstream by a pump (where it says "flow" in the figure), is it more power efficient to maximize the area of the jet or maximize the velocity of the jet to achieve the required flow rate? Justify your answer assuming a constant head upstream of the pump and inviscid incompressible flow. A water jet strikes a block and is then deflected 90° (vertically) with respect to the block. The block is initially at rest and is accelerated by the water jet. The mass of the block is 100 kg, which is assumed to be much greater than the mass of the water in the jet (only include the mass and velocity of the block in the momentum accumulation term of the momentum conservation equation). If the volume flow rate from the jet is 0.045 m³/s and the jet diameter is 5cm, find the time required for the block to get to a speed 50%, 75%, 90%, 95% of the jet speed. Neglect friction between the block and the surface it slides on. Flow a. S=0.5 b. S=2 1. How does the time required for the block to achieve a speed 50% of the jet speed change if the water is replaced with a fluid having a specific gravity of: a. b. 2 2. How does the time required for the block to achieve a speed 50% of the jet speed change if the water is deflected by: 45° 135° C. 180° (full reverse) Vb with respect to the block? 3. If the jet is driven upstream by a pump (where it says "flow" in the figure), is it more power efficient to maximize the area of the jet or maximize the velocity of the jet to achieve the required flow rate? Justify your answer assuming a constant head upstream of the pump and inviscid incompressible flow.
Expert Answer:
Answer rating: 100% (QA)
SOLUTION 1 The time required for the block to achieve a speed 50 of the jet speed will depend on the specific gravity of the fluid The specific gravit... View the full answer
Related Book For
Engineering Fluid Mechanics
ISBN: 9781118880685
11th Edition
Authors: Donald F. Elger, Barbara A. LeBret, Clayton T. Crowe, John A. Robertson
Posted Date:
Students also viewed these accounting questions
-
Degree 4 polynomial with zeros x = 2 (multiplicity 2), x=3+2i, and x=3-2i and f(0)=-26
-
Managing Scope Changes Case Study Scope changes on a project can occur regardless of how well the project is planned or executed. Scope changes can be the result of something that was omitted during...
-
Analyze the chords specified by this figured bass, and add inner voices to make a four-part texture. Bracket all circle-of-fifths progressions, even those that contain only two chords. 9: 0 Be 0.
-
In Exercise solve the given equations and check the results. F-3 12 2 3 || 1 - 3F 2
-
Determine by direct integration the moment of inertia with respect to the z axis of the semi ellipsoid shown assuming that it has a uniform density and a mass m.
-
In the design of a control mechanism, the vertical slotted guide is moving with a constant velocity x = 15 in. /sec during the interval of motion from x = 8 in. to x = +8 in. For the instant when x =...
-
Suppose that in the maintenance of a large medicalrecords file for insurance purposes the probability of an error in processing is 0.0010, the probability of an error in filing is 0.0009, the...
-
Lundquist, Inc., uses the group depreciation method for its furniture account. The depreciation rate used for furniture is 21%. The balance in the furniture account on December 31, 2010, was...
-
The treasurer of Banila co. has projected the cash flows of Project A, B, and C as follows: Year Project A Project B Project C 1 -$405,000 -$810,000 -$405,000 2 297,000 540,000 324,000 3 297,000...
-
The owner of Neros company has hired you to analyze her company's performance and financial position, as well as the positions of Iits competitors, Centar and Xermix. However, the data Neros abtained...
-
QUESTION 4/12 Which pair of financial statements show depreciation expense? Income statement and statement of owner's equity Income statement and balance sheet Balance sheet and statement of owner's...
-
You arrive at Bob's house to conduct an intake assessment. Bob is an 85-year-old man who recently fell at home and broke his arm. Bob is a very active man who cares for his wife Nelly, who suffers...
-
1) Whiteness operates in covert and overt ways that affect all of us. It can appear as practices within an institution or accepted social norms. Since whiteness works almost invisibly, we may not...
-
Job number A9028 requires $300 of direct materials and $400 of direct labour which is paid at the rate of $8 per hour. Production overheads are applied at a rate of $26 per direct labour hour....
-
You are a consultant hired to provide guidance for a family-owned small-sized accounting and marketing service-based business with 20 employees in Vancouver, B.C. The organisation earns revenue by...
-
1. What are some of the messages you received during your childhood about being/becoming a boy/man or a girl/woman in a Mexican household? 2. What were some of the positive aspects of getting those...
-
Barnes Boards manufactures two types of skateboards: A standard board and a long board. Currently, Barnes Boards uses a traditional cost accounting system where direct labor hours are used to assign...
-
We all experience emotions, but some people disguise their true feelings better than others. Do you think this is a helpful or harmful thing to do? Under what conditions do you think it would be most...
-
An ultralight airplane has a wing with an aspect ratio of 5 and with lift and drag coefficients corresponding to Fig. 11.24. The planform area of the wing is 200 ft 2 . The weight of the airplane and...
-
Water is forced out of this cylinder by the piston. If the piston is driven at a speed of 6 ft/s, what will be the speed of efflux of the water from the nozzle if d = 2 in. and D = 4 in.? Neglecting...
-
Kerosene (20C) flows at a rate of 0.04 m 3 /s in a 25 cm diameter pipe. Would you expect the flow to be laminar or turbulent? Calculate the entrance length.
-
If the angle between vectors \(\vec{A}\) and \(\vec{B}\) is \(110^{\circ}\) and if \(A=1.7 \mathrm{~N}\) and \(B=2.0 \mathrm{~m}\), what is the value of \(\vec{A} \cdot \vec{B}\) ?
-
You throw a textbook to a friend who is at their dormitory window \(2.2 \mathrm{~m}\) above you. You are standing \(4.0 \mathrm{~m}\) away from the building and your throw is perfectly made such that...
-
A force \(\vec{F}=F_{x} \hat{\imath}+F_{y} \hat{\jmath}\) with \(F_{x}=50 \mathrm{~N}\) and \(F_{y}=12 \mathrm{~N}\) is exerted on a particle as the particle moves along the \(x\) axis from \(x=1.0...
Study smarter with the SolutionInn App