Fundamentals of Thermal-Fluid Sciences
5th Edition
ISBN: 9780078027680
Author: Yunus A. Cengel Dr., Robert H. Turner, John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 13, Problem 15P
To determine
The hydraulic force exerted on the plate when the velocity of water stream is doubled.
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Q6/ A helical square section spring is set inside another, the outer spring having a free
length of 35 mm greater than the inner spring. The dimensions of each spring are as
follows:
Mean diameter (mm)
Side of square section (mm)
Active turns
Outer
Inner
Spring
Spring
120
70
8
7
20
15
Determine the (1) Maximum deflection of the two springs and (2) Equivalent spring
rate of the two springs after sufficient load has been applied to deflect the outer
spring 60 mm. Use G = 83 GN/m².
Q2/ The bumper springs of a railway carriage are to be made of rectangular section wire.
The ratio of the longer side of the wire to its shorter side is 1.5, and the ratio of mean
diameter of spring to the longer side of wire is nearly equal to 6. Three such springs
are required to bring to rest a carriage weighing 25 kN moving with a velocity of
75 m/min with a maximum deflection of 200 mm. Determine the sides of the
rectangular section of the wire and the mean diameter of coils when the shorter side is
parallel to the axis of the spring. The allowable shear stress is not to exceed 300 MPa
and G = 84 kN/mm².
Q6/ A belical
11.
A load of 2 kN is dropped axially on a close coiled helical spring, from a height of 250 mm. The spring
has 20 effective turns, and it is made of 25 mm diameter wire. The spring index is 8. Find the maximum
shear stress induced in the spring and the amount of compression produced. The modulus of rigidity
for the material of the spring wire is 84 kN/mm².
[Ans. 287 MPa; 290 mm]
Chapter 13 Solutions
Fundamentals of Thermal-Fluid Sciences
Ch. 13 - Prob. 1PCh. 13 - Express Newton’s second law of motion for rotating...Ch. 13 - Prob. 3PCh. 13 - Prob. 4PCh. 13 - Prob. 5PCh. 13 - Prob. 6PCh. 13 - Prob. 7PCh. 13 - Prob. 8PCh. 13 - Prob. 9PCh. 13 - Prob. 10P
Ch. 13 - Prob. 11PCh. 13 - Prob. 12PCh. 13 - Prob. 13PCh. 13 - Prob. 14PCh. 13 - Prob. 15PCh. 13 - Prob. 16PCh. 13 - Prob. 17PCh. 13 - Prob. 18PCh. 13 - Water enters a 10-cm-diameter pipe steadily with a...Ch. 13 - A 2.5-cm-diameter horizontal water jet with a...Ch. 13 - A horizontal water jet of constant velocity V...Ch. 13 - A 90° elbow in a horizontal pipe is used to direct...Ch. 13 - Prob. 23PCh. 13 - Prob. 24PCh. 13 - Prob. 25PCh. 13 - Prob. 26PCh. 13 - Water accelerated by a nozzle to 35 m/s strikes...Ch. 13 - Prob. 28PCh. 13 - Prob. 29PCh. 13 - Prob. 31PCh. 13 - Prob. 32PCh. 13 - Prob. 33PCh. 13 - Prob. 34PCh. 13 - Prob. 35PCh. 13 - A 3-in-diameter horizontal water jet having a...Ch. 13 - Prob. 38PCh. 13 - Reconsider the helicopter in Prob. 13–38, except...Ch. 13 - Prob. 40PCh. 13 - Prob. 41PCh. 13 - Prob. 42PCh. 13 - Prob. 43PCh. 13 - Prob. 44PCh. 13 - Prob. 45PCh. 13 - Prob. 46PCh. 13 - Prob. 47PCh. 13 - Prob. 48RQCh. 13 - Prob. 49RQCh. 13 - Prob. 50RQCh. 13 - A 6-cm-diameter horizontal water jet having a...Ch. 13 - Prob. 52RQCh. 13 - A tripod holding a nozzle, which directs a...Ch. 13 - Prob. 54RQCh. 13 - Prob. 56RQCh. 13 - Prob. 57RQCh. 13 - Prob. 58RQCh. 13 - Prob. 59RQCh. 13 - Indiana Jones needs to ascend a 10-m-high...Ch. 13 - Prob. 61RQCh. 13 - Nearly frictionless vertical guide rails maintain...Ch. 13 - Prob. 63RQCh. 13 - Prob. 64RQ
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