When a compressive stress is applied parallel to the fibers of a composite material, cracks form at the fiber-matrix interface due to _________effect strain.
Fill in the blank(s) with the appropriate word(s).
Poisson’s
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A(n) ____ orbit is one where the orbiting object is always above the same location on Earth's surface
a. closed b. elliptical c. geosynchronous d. hyperbolic e. parabolic
A child has a temperature of 101°F. If her total cross-sectional area is 2 m2, find the energy lost each second (in W) due to radiation, assuming the emissivity is 1. (Assume the room temperature is 70°F.)
A. 217 B. 180 C. 90 D. 68 E. 850
Two concentric imaginary spherical surfaces of radius R and 2R, respectively, surround a positive point charge Q located at the center of the surfaces. When compared to the electric flux ?1 through the surface of radius R, the electric flux ?2 through the surface of radius 2R is
A.
.B.
.C.
D.
E.
You have a choice between two lenses of focal lengths fa and fb, where fb = 2fa, to use as the objective lens in building a compound microscope. If the magnification you obtain using lens a is Ma, what will be the magnification when using lens b?
A) Mb = 2 Ma B) Mb = 4 Ma C) Mb = 8 Ma D) Mb = Ma/4 E) Mb = Ma/2