A.A
B.B
C.C
D.D
E. Toward the viewer
F. Away from the viewer
T. The field is zero.
T. The field is zero.
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Design a composite material made of epoxy and uniaxial E-glass fibers that has an axial elastic modulus of 50 GPa. The epoxy resin has an elastic modulus of 5 GPa, and the E-glass fibers have an elastic modulus of 72.4 GPa.
(a) What is the volum fraction of fibers and matrix in this composite? (b) What is the transverse elastic modulus of this material?
A refrigerator uses 40.0 J of work to extract 90.0 J from a heat reservoir at 
What is the coefficient of performance for the refrigerator?
A. 1.60 B. 2.05 C. 2.25 D. 2.85
The flight of a blimp best illustrates
A) Archimedes' principle. B) Pascal's principle. C) Bernoulli's principle. D) Boyle's law.
A long straight wire (diameter = 2.0 mm) carries a current of 30 A. What is the magnitude of the magnetic field 2.5 mm from the axis of the wire?
A. 3.2 mT B. 2.8 mT C. 2.4 mT D. 3.6 mT E. 3.0 mT