Tensile Stress and Strain: As one stretches a metal wire, which condition is reached first?
A. the elastic limit
B. the breaking point
C. the proportional limit
Answer: C
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During a period of high solar activity, the corona:
A) disappears. B) is more irregular. C) cools almost to the temperature of the photosphere. D) becomes smooth and even. E) shrinks to half its normal size.
A uniform cylinder of radius R, mass M, and length L rotates freely about a horizontal axis parallel and tangent to the cylinder, as shown below. The rotational inertia of the cylinder about this axis is
?
?
a.
.
b.
A fusion reaction releases energy because the binding energy of the resulting nucleus
A) is less than the binding energy of the original nuclei. B) is absorbed in the process. C) is equal to the binding energy of the original nuclei. D) is greater than the binding energy of the original nuclei. E) is released in the process.
Associations are loose groups of young stars in the spiral arms usually mingled with large clouds of gas and dust.
Answer the following statement true (T) or false (F)