The warmer brown dwarfs fall in spectral class _____
A) O
B) A
C) L
D) T
C
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At the critical fiber length in a short fiber composite, the fiber stress at the center of the fiber length is equal to the fiber stress in a _________fiber composite.
Fill in the blank(s) with the appropriate word(s).
The triple alpha process
a. controls the pulsations in Cepheid variable stars. b. is the nuclear fusion of hydrogen to helium in massive stars. c. is the process that produces the neutrinos we receive from the sun. d. requires a temperature of about 5,000,000 K to operate e. occurs during helium flash.
The separation of the strong force and the electroweak force ____
a. provided the energy for a rapid inflation of the early Universe b. created the cosmic microwave background radiation c. balanced the critical density of the Universe to solve the flatness problem d. created dark matter e. created dark energy
An isothermal process for an ideal gas is represented on a p-V diagram by:
A. a horizontal line B. a vertical line C. a portion of an ellipse D. a portion of a parabola E. a portion of a hyperbola