The _____________strength of a brittle or composite material is the maximum tensile stress determined from a three-point bend test.
Fill in the blank(s) with the appropriate word(s).
flexural
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At what orientation angle relative to the magnetic field direction does the magnetic potential energy of a magnetic dipole have its largest value?
a) 0° b) 45° c) 90° d) 135° e) 180°
You can safely hold your fingers on both sides of a candle flame due mainly to
A) conduction. B) convection. C) radiation. D) none of the above
Martian "blueberries" made of the mineral hematite which form in water were first discovered by which Mars rover?
A) Spirit B) Opportunity C) Curiosity D) Sojourner
Which of the following gives the two main assumptions of theoretical models of galaxy evolution?
A) Hydrogen and helium filled all of space, and the entire universe had exactly the same density everywhere. B) The universe has always been expanding, and denser areas contracted to form the first stars. C) Hydrogen and helium filled all of space, and certain regions of the universe were slightly denser than others. D) The beginning of the universe is modeled after a supernova explosion, and all elements were produced by this exploding star. E) The universe was composed originally only of hydrogen, and all the other elements came from stars.