Determine the increase in the open spacing between precipitate particles that occurs when the 2014 aluminum alloy shown in Figure 7.17 is aged for 1000 h at 149°C (300°F), relative to the value at peak strength that is calculated in Example Problem 7.5. Assume that the as-quenched yield strength of 100 MPa is the value of ?0, that the lattice parameter of FCC aluminum is 0.404 nm, and that the shear modulus of this alloy is equal to that of aluminum given in Table 6.1.
What will be an ideal response?
The tensile yield strength of a precipitation hardened alloy is given by
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Acceleration: Which of the following situations is impossible?
A. An object has velocity directed east and acceleration directed west. B. An object has velocity directed east and acceleration directed east. C. An object has zero velocity but non-zero acceleration. D. An object has constant non-zero acceleration and changing velocity. E. An object has constant non-zero velocity and changing acceleration.
The central star of the Crab Nebula has now collapsed into a(n) ________, whose energy keeps this famous nebula visible even in binoculars
Fill in the blank(s) with correct word
A node is a position of
A) minimum amplitude. B) maximum amplitude. C) minimum frequency.
When water freezes, the surrounding air is
1) cooled, 2) warmed, 3) unchanged, and when ice melts, the surrounding air is 4) cooled. 5) warmed. 6) unchanged.