AUTOMOTIVE TECHNOLOGY TECH MANUAL
AUTOMOTIVE TECHNOLOGY TECH MANUAL
7th Edition
ISBN: 9781337794220
Author: ERJAVEC
Publisher: CENGAGE L
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Chapter 20, Problem 5ASRQ

Technician A says that a composite headlight housing that is cloudy should be replaced. Technician B says that clouding or oxidizing of the composite housing or lens may be removed. Who is correct?

a. Technician A

b. Technician B

c. Both A and B

d. Neither A nor B

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9₁ A Insulated boundary Insulated boundary dx Let's begin with the strong form for a steady-state one-dimensional heat conduction problem, without convection. d dT + Q = dx dx According to Fourier's law of heat conduction, the heat flux q(x), is dT q(x)=-k dx. x Q is the internal heat source, which heat is generated per unit time per unit volume. q(x) and q(x + dx) are the heat flux conducted into the control volume at x and x + dx, respectively. k is thermal conductivity along the x direction, A is the cross-section area perpendicular to heat flux q(x). T is the temperature, and is the temperature gradient. dT dx 1. Derive the weak form using w(x) as the weight function. 2. Consider the following scenario: a 1D block is 3 m long (L = 3 m), with constant cross-section area A = 1 m². The left free surface of the block (x = 0) is maintained at a constant temperature of 200 °C, and the right surface (x = L = 3m) is insulated. Recall that Neumann boundary conditions are naturally satisfied…

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AUTOMOTIVE TECHNOLOGY TECH MANUAL

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