The following exact conversion equivalents are given: 1 m = 100 cm , 1 in = 2.54 cm, and If a computer screen has an area of 1.27 , this area is closest to
A) 0.00284 m2.
B) 0.0465 m2.
C) 0.118 m2.
D) 0.284 m2.
E) 4.65 m2.
Answer: C
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An aluminum cantilever beam of length L 5 0.65 m carries a distributed load, which includes its own weight, of intensity q/2 at A and q at B. The beam cross section has a width of 50 mm and a height of 170 mm. Allowable bending stress is 95 MPa and allowable shear stress is 12 MPa. The permissible value of load inten- sity q is approximately:
(A) 110 kN/m
(B) 122 kN/m
(C) 130 kN/m
(D) 139 kN/m
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Two ideal Carnot heat engines have the same efficiency. One operates between 5.0 × 102 K and 3.0 × 102 K, and the other between 4.0 × 102 K and some lower temperature. What is the lower temperature?
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An eagle, with a wingspread of 2.0 m, flies toward the north at 8.0 m/s in a region where the vertical component of the earth's magnetic field is 0.20 × 10-4 T
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