Theory and Design for Mechanical Measurements
6th Edition
ISBN: 9781119031703
Author: FIGLIOLA
Publisher: WILEY
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Chapter 11, Problem 11.3P
To determine
Estimated change in length, lateral strain and the dilatation for a steel rod.
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The two disks A and B have a mass of 4 kg and 6 kg,
respectively. They collide with the initial velocities shown. The
coefficient of restitution is e = 0.75. Suppose that
(VA)1 = 6 m/s, (VB)₁ = 7 m/s. (Figure 1)
Determine the magnitude of the velocity of A just after impact.
Determine the angle between the x axis and the velocity of A just after impact, measured clockwise from the negative x axis.
Determine the magnitude of the velocity of B just after impact.
Determine the angle between the x axis and the velocity of B just after impact, measured clockwise from the positive x axis.
(VB)1
B
(VA)1
60°
Line of impact
A hot plane surface is maintained at 100°C, and it is exposed to air at 25°C.The combined heat transfer coefficient between the surface and the air is 25W/m²·K. (same as above). In this task, you are asked to design fins to cool asurface by attaching 3 cm-long, 0.25 cm-diameter aluminum pin fins (thermalconductivity, k = 237 W/m·K) with a center-to-center distance of 0.6 cm. (Tip:do not correct the length). Determine the rate of heat transfer from thefinned structure to the air for a 1 m x 1 m section of the plate.
Heat is generated uniformly in a 4 cm-diameter, 16-cm long solid bar (k=2.4 W/m-K). The temperaturesat the center and at the surface of the bar are measured to be 210 oC and 45 oC, respectively. Calculatethe rate of heat generation within the bar. Solve the relevant energy balance equation and the boundaryconditions to calculate the rate of heat generation within the bar. (6 pts)
Chapter 11 Solutions
Theory and Design for Mechanical Measurements
Ch. 11 - Prob. 11.1PCh. 11 - 11.2 Calculate the change in length of a steel rod...Ch. 11 - 11.1 Calculate the change in length of a steel rod...Ch. 11 - 11.2 Calculate the change in length of a steel rod...Ch. 11 - 11.5 An electrical coil is made by winding copper...Ch. 11 - Compare the resistance of a volume of k X IO-2* m3...Ch. 11 - A conductor made of nickel (p, = 6.8 x 10-8 Q m)...Ch. 11 - Consider a Wheatstone bridge circuit that has all...Ch. 11 - 11.9 Consider a Wheatstone bridge circuit that has...Ch. 11 - 11.10 A resistance strain gauge with R = 120 Q and...
Ch. 11 - 11.11 A strain gauge that has a nominal resistance...Ch. 11 - Prob. 11.12PCh. 11 - 11.13 A single strain gauge is mounted as shown in...Ch. 11 - 11.14 A single strain gauge is mounted on a...Ch. 11 - 11.15 Equation 11.15 provides an expression for...Ch. 11 - 11.17 A steel beam member (vp = 0.3) is subjected...Ch. 11 - An axial strain gauge and a transverse strain...Ch. 11 - A strain gauge is mounted on a steel cantilever...Ch. 11 - Two strain gauges are mounted so that they sense...Ch. 11 - A rectangular bar is instrumented with strain...Ch. 11 - 11.23 A round member having a cross-sectional area...Ch. 11 - 11.24 A square structural member having a cross...Ch. 11 - 11.25 Show that the use of a dummy gauge together...Ch. 11 - Show that four strain gauges mounted to a shaft...Ch. 11 - 11.27 For each bridge configuration described...Ch. 11 -
Figure 11.25 Bridge arrangement for Problems...Ch. 11 - Prob. 11.29PCh. 11 - Prob. 11.30P
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