Thinking Like an Engineer: An Active Learning Approach (4th Edition)
4th Edition
ISBN: 9780134639673
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Chapter 14.5, Problem 8CC
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Truncation errors are increased as the round-off errors are decreased.Group of answer choices True False
Say, you have a thermometer and you are checking the temperature of a body that has a temperature of 36o Using your thermometer five times, it gives you the following measurements: 29oC, 29.2oC, 29.3oC, 28.9oC, and 29.1oC. What can we conclude about the accuracy and the precision of the thermometer?Group of answer choices The thermometer is not accurate and not precise The thermometer is faulty. The thermometer is accurate and precise The thermometer is not accurate but precise.
Say, you have a thermometer and you are checking the temperature of a body that has a temperature of 36o Using your thermometer five times, it gives you the following measurements: 36oC, 35.6oC, 36oC, 37oC, and 36.2oC. What can we conclude about the accuracy and the precision of the thermometer?Group of answer choices The thermometer is accurate and precise. The thermometer is accurate but not precise. The…
1. To determine the dynamic viscosity of a liquid you take repeated measurements of the liquid density and kinematic
viscosity. These data are summarized in the following table:
Avg. measurement
Total Uncertainty
P
999 kg/m³
±0.5%
V
1.23 mm²/s
±0.01 mm²/s
kg
Ns
What is the dynamic viscosity? Give dynamic viscosity in units of; which is the same as
ms
2. Determine the absolute and relative uncertainties in the dynamic viscosity.
Pressurized eyes Our eyes need a certain amount of internal pressure in order to work properly, with the normal range being between 10 and 20 mm of mercury. The pressure is determined by a balance between the fluid entering and leaving the eye. If the pressure is above the normal level, damage may occur to the optic nerve where it leaves the eye, leading to a loss of the visual field termed glaucoma. Measurement of the pressure within the eye can be done by several different noninvasive types of instruments, all of which measure the slight deformation of the eyeball when a force is put on it. Some methods use a physical probe that makes contact with the front of the eye, applies a known force, and measures the deformation. One non-contact method uses a calibrated “puff” of air that is blown against the eye. The stagnation pressure resulting from the air blowing against the eyeball causes a slight deformation, the magnitude of which is correlated with the pressure within the eyeball.…
Chapter 14 Solutions
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
Ch. 14.1 - The following table lists the number of computer...Ch. 14.2 - For the following mass data g1ven in units of...Ch. 14.2 - For the following temperature data given in units...Ch. 14.3 - For each of the following graphs, decide if the...Ch. 14.3 - Use the scenario described in Example 14-4. For...Ch. 14.4 - Consider the weight of shipping boxes sent down an...Ch. 14.4 - Prob. 7CCCh. 14.5 - Prob. 8CCCh. 14 - For the following pressure data, recorded in units...Ch. 14 - A technician tested two temperature probes by...
Ch. 14 - One of the NAE Grand Challenges for Engineering is...Ch. 14 - You use the data from the Mauna Loa observatory in...Ch. 14 - Polyetheretherketone (PEEK)TM polymers are...Ch. 14 - A technician tested a temperature probe by...Ch. 14 - During November, the heading system in your...Ch. 14 - You are assigned to inspect metal-composite beam...Ch. 14 - Use the scenario described in the preceding...Ch. 14 - You test several temperature probes by inserting...Ch. 14 - Use the scenario described in the previous Problem...Ch. 14 - Prob. 14ICACh. 14 - The following data were collected from a...Ch. 14 - The following data were collected from a...Ch. 14 - The following table lists the number of resin...
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- Your professor has recruited you to work in her lab to help her win the Nobel Prize. It is critical that your work be as accurate as possible. Rather than using the stated volumes of glassware in the lab, you decide to calibrate each piece. An empty 10-mL volumetric flask weighed 10.263 4 g. When filled to the mark with distilled water at 208C, it weighed 20.214 4 g. What is the true volume of the flask?arrow_forward16000 1.440 14000 1.435 12000 1.430 10000 1.425 8000 1.420 6000 1.415 4000 1.410 2000 1.405 1.400 45 15 20 25 30 35 40 Temperature ["C] +dynamic viscosity (mPas] + density (gicm") Figure 1 (a) As shown in Figure 1, viscosity and density of honey was found to decrease with increase in temperature. Explain the reasons behind these phenomenon related to Fluid Mechanics in microscopic view. Dynamic viscolsty [mPa.s] Density [g/cm³]arrow_forwardA chamber of unknown volume is filled with an unknown amount of ideal gas. A cylinder with an open bottom and calibrated volume is connected to the chamber and is closed with a movable piston. A gas pressure sensor is also mounted on the chamber as shown in the figure. The whole experimental setup is kept at a constant temperature of 300 K. Doris moves the piston from mark 0 to mark 200 mL in steps of 50 mL and records the corresponding pressure in the chamber (see the table below). She moves the piston very slowly and waits several minutes before recording the pressure values. VCyl(mL) P(105N/m2)) 0 4.35 50 3.85 100 3.50 150 3.15 200 2.90 Determine the volume of the chamber using Doris's data in the table. (Note: This is a problem that requires linearization of data.) Determine the number of moles of gas. (Note: This is a problem that requires linearization of data.)arrow_forward
- Determine the units of the variable x in each of the following equations, and specify which rule you used to determine this. Do not solve for the numeric value of x. Show your work beneath the question, or on a separate sheet of paper. Example: 315 feet = (32)x² Rule #1: Both sides of the equal sign must have the same units. Rule #2: Values that are added or subtracted must have the same units. Rule #13: Argument of a trig function must be an angle. Rule #14: Argument of an inverse trig function must have no units. Rule #5: Exponents must have no units. x has units of seconds because of Rule # 1arrow_forward56.0 mL of two different liquids are poured through a funnel with a narrow exit tube, and the time for all of the liquid to flow through is recorded. Here are some results: time to flow through funnel trial Liquid X Liquid Y 1.60 s 3.62 s 1.52 s 3.44 s 1.44 s 3.56 s Note: the two liquids have the same density. Which statement below is true about these liquids based only on the data in the table? O The intermolecular forces in liquid X are stronger than those in liquid Y. The boiling point of liquid X is higher than the boiling point of liquid Y. The viscosity of liquid X is greater than the viscosity of liquid Y. The surface tension of liquid X is greater than the surface tension of liquid Y. The viscosity of liquid X is less than the viscosity of liquid Y. 3.arrow_forwardWe wish to measure a characteristic of a machined part whose nominal size is 50 mm at 20 °C. For this, two different instruments are used; an analog micrometer and a digital vernier caliper, both recently calibrated and with the same resolution (0.01 mm). The calibration certificate data of the analog micrometer and the digital vernier are shown in tables 5 and 6 respectively. In both cases the calibration uncertainty does not include the contribution of resolution uncertainty. Additionally, there are drift studies for both instruments and it is established that the drift of the micrometer is ± 0.002 mm while the drift of the vernier is ± 0.02 mm. The same number of measurements were performed with both instruments to avoid repeatability biases under controlled environmental conditions. Table 7 shows the results of the measurements of both instruments. The temperature of the piece was monitored with a digital thermometer whose calibration uncertainty is 0.1 °C, which already includes…arrow_forward
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- Areas Under the Standard Normal Curve-The Values Were Generated Using the Standard Normal Distribution Function of Excel Note that the standard normal curve is symmetrical about the mean. z 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.12 1 0.95 0.96 0.97 0.98 0.99 1.01 1.02 1.03 1.04 1.05 Mean - 0 1.06 1.07 1.08 1.09 A 0.0000 0.0040 0.0080 0.0120 0.0160 0.0199 0.0239 0.0279 0.0319 0.0359 0.0398 0.0438 0.0478 A 0.3186 0.3212 0.3238 0.3264 0.3289 0.3315 0.3340 0.3365 0.3389 Z 0.3413 0.3438 0.3461 0.3485 0.3508 0.3531 0.3554 0.3577 0.3599 0.3621 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.2 0.21 0.22 0.23 0.24 0.25 1.12 1.13 1.14 1.15 1.16 1.17 A z 0.0517 0.0557 0.26 0.27 0.28 0.29 0.0596 0.0636 0.0675 0.3 0.0714 0.31 0.0753 0.32 0.0793 0.33 0.0832 0.34 0.0871 0.35 0.0910 0.0948 0.0987 1.18 1.19 1.2 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28 A 0.3643 0.3665 0.3686 0.3708 0.3729 0.3749 0.3770 0.3790 0.3810 0.36 0.3830 0.3849 0.3869 0.3888 0.3907 0.3925 0.3944 0.3962 0.3980 0.3997 0.37…arrow_forwardQuestion 4 Viscosity. From studies of the flow of neutrophils in micropipets, it is possible to measure the apparent viscosity of the cytoplasm. From the data below, do you think the cytoplasm is Newtonian? If not, determine the rheological relationship that best describes the behavior of the cytoplasmic viscosity Shear rate (s1) Apparent Viscosity (Pa s) 450 0.111 1 137 2.70 97 5.75 58 7 58arrow_forwardA temperature measurement system has the following specifications: -128 to 781°C Range Linearity error 0.29% FSO Hysteresis error 0.12% FSO Sensitivity error 0.04% FSO Zero drift 0.32% FSO FSO stands for "Full Scale Output". Estimate the overall instrument uncertainty for this system based on the available information. Use the maximum possible output range over the FSO in your computations.arrow_forward
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