Composite _________is produced by laying fibers in random directions in a plane.
Fill in the blank(s) with the appropriate word(s).
mat
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An H-R diagram for a globular cluster will show a horizontal branch, which is a line of stars above the main-sequence but to the left of the subgiants and red giants. Which of the following statements about these horizontal branch stars is true?
A) They have inert (nonfusing) carbon cores. B) Their sole source of energy is hydrogen shell fusion. C) They generate energy through both hydrogen fusion and helium fusion. D) In a particular star cluster, all horizontal branch stars have the same spectral type.
The ultimate fate of our Sun is to ________
A) become a white dwarf that will slowly cool with time B) become a rapidly spinning neutron star C) become a black hole D) explode in a supernova
When hydrogen reacts with ethene, what is the product?
a. Cycloethene b. Ethane c. Propene d. Ethyne e. Methane
A bridge is made with segments of concrete 50 m long. If the linear expansion coefficient is 12 × 10^?6 (°C)?1, how much spacing (in cm) is needed to allow for expansion during an extreme temperature change of 150° F?
a. 10 b. 2.5 c. 7.5 d. 5.0 e. 9.5