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Concept explainers
A manufacturer wants to quantify the expected average fuel mileage of a product line of automobiles. It decides that cither it can put one or more cars on a chassis dynamometer and run the wheels at desired speeds and loads to assess this, or it can use drivers and drive the cars over some selected course instead, (a) Discuss the merits of either approach, considering the control of variables and identifying extraneous variables, (b) Can you recognize that somewhat different tests might provide answers to different questions? For example, discuss the difference in meanings possible from the results of operating one car on the dynamometer and comparing it to one driver on a course. Cite other examples.
(c) Do these two test methods serve as examples of concomitant methods?
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Chapter 1 Solutions
Theory and Design for Mechanical Measurements
- A distillation column with a total condenser and a partial reboiler is separating ethanol andwater at 1.0 atm. Feed is 0.32 mol fraction ethanol and it enters as a saturated liquid at 100mol/s on the optimum plate. The distillate product is a saturated liquid with 80 mol% ethanol.The condenser removes 5615 kW. The bottoms product is 0.05 mol fraction ethanol. AssumeCMO is valid.(a) Find the number of equilibrium stages for this separation. [6 + PR](b) Find how much larger the actual reflux ratio, R, used is than Rmin, i.e. R/Rmin. [3]Note: the heats of vaporization of ethanol and water are λe = 38.58 and λw = 40.645 arrow_forwardA ship of 7000 tonne displacement has a waterplane areaof 1500 m2. In passing from sea water into river water of1005 kg/m3 there is an increase in draught of 10 cm. Find the Idensity of the sea water. i would like to get the above question sloved in detail. ive attached the picture of the answer from the reeds book. just not sure of all the steps theyve used and the formula in which they started with.arrow_forwardPlunger Gauses:) - True or False "A Plunger gage can read small fluctuations in pressure such as a change in pressure of 2 psi"arrow_forward
- Cushioning: (Q1) A cylinder is used to clamp onto rubber tires on an assembly line. The cylinder quickly extends and clamps onto the tire and robot puts a label onto the tire. The cylinder then retracts quickly to unclamp the tire. Which of these four cylinders is best for the job? A 0 A Selection A is best B Selection B is best (C) Selection C is best D) Selection D is best B Darrow_forwardBourdon Gauges: (Q4) - True of False "A Bourdon gauge is used to measure high pressures above 500 psi"arrow_forwardWeight of Air: If you could collect the air in a square inch column of air starting at sea level going all the way to space, how much would it weigh? Answer with one decimal. Do not write the unit.arrow_forward
- Piston Area: (Q2) A cylinder applies a force of 400 pounds in extension. If the pressure in the cylinder is 39 psi what is the area of the piston in square inches? Use πon your calculator Answer with two decimals. Do not write the unit.arrow_forwardA 2D incompressible flow has velocitycomponents u= X^2 - 2y^2 and v=aX^b y^c ,where a, b, and c are numbers. Find the values of a, b, and c Find the stream functionarrow_forwardPlease can you assist with the attached question please?arrow_forward
- (a) Find a second-order homogeneous linear ODE for which the given functions are solutions. (b) Show linear independence by the Wronskian. (c) Solve the initial value problem. a. cos(5x), sin(5x), y(0) = 3, y'(0) = −5 b. e-2.5x cos(0.3x), e-2.5x sin(0.3x), y(0) = 3, y'(0) = -7.5arrow_forwardSolve the IVP. a. y" 16y 17e* ; = y(0) = 6, y'(0) = -2 b. (D² + 41)y = sin(t) + ½ sin(3t) + sin(t) ; y(0) = 0, y'(0) : = 35 31arrow_forwardFind the general solution. a. y' 5y = 3ex - 2x + 1 - b. y" +4y' + 4y = e¯*cos(x) c. (D² + I)y = cos(wt), w² # 1arrow_forward
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