In the context of the unified model of active galactic nuclei (AGN), you will be able to see the broad-line region if the accretion disk of a galaxy is tipped slightly
Indicate whether the statement is true or false
True
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Which of the following is not a point defect?
(a) Dislocation (b) Interstitial (c) Vacancy (d) Frenkel
Venus's crust is thicker than Earth's because
A. Venus has little internal activity, keeping the crust from melting. B. the high temperatures at the surface of Venus have baked the crust. C. volcanic eruptions continuously add more material to the surface. D. rocks on Venus melt at higher temperatures.
The observation that materials expand in size with an increase in temperature can be applied to what proportion of existing substances?
a. 100% c. few b. most d. none
A certain metal has a resistivity of 1.68 × 10-8 ? ? m. You have a long spool of wire made from this metal. If this wire has a diameter of 0.15 mm, how long should you cut a segment so its resistance will be 15 ??
A) 16 mm B) 16 cm C) 1.6 m D) 16 m