An aluminum bar (E 5 72 GPa, ? 5 0.33) of diameter 50 mm cannot exceed a diameter of 50.1 mm when compressed by axial force P. The maximum acceptable compressive load P is approximately:

(A) 190 kN
(B) 200 kN
(C) 470 kN
(D) 860 kN


(D) 860 kN

Physics & Space Science

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The electrical resistivity of pure copper metal at 0°C is 1.6×10-8 ??m. An alloy of 1.12 atom % nickel, which is substitutional in copper, produced with this copper has an electrical resistivity at 0°C of 3×10-8 ??m. What is the electrical resistivity of an alloy produced from this copper with 3.32 atom % nickel at 0°C?

What will be an ideal response?

Physics & Space Science

If the internal temperature of the sun is 15 x 106 K, what is the average kinetic energy of protons in this environment?

A) 0.040 eV B) 1.3 keV C) 1.9 keV D) 1.3 MeV E) 1.9 MeV

Physics & Space Science

In a large tank of liquid, the hydrostatic pressure at a given depth is a function of:

a. depth. c. liquid density. b. surface area. d. Choices a and c are both valid.

Physics & Space Science

A rectangular coil, with corners labeled ABCD, of length L and width w is placed in a magnetic field B as shown in Figure 27-6. If there is a current I flowing through this coil, what is the force acting on section AB of this coil?

A) ILB sin? B) ILB cos ? C) ILB D) 0 N E) ILB/2

Physics & Space Science