Fiber-optic cable relies upon _________ to keep all of the light in the cable.
Fill in the blank(s) with the appropriate word(s).
total internal reflection
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For a metal with the indicated structure, which of these is not the shortest Burger’s vector in the indicated metal crystal structure?
The Big Dipper is
a. a circumpolar constellation for southern hemisphere observers. b. always on an observer's zenith. c. an asterism. d. only visible from the southern hemisphere. e. a constellation.
A titanium bar (E 5 100 GPa, v 5 0.33) with square cross sec-tion (b 5 75 mm) and length L 5 3.0 m is subjected to tensile load P 5 900 kN. The increase in volume of the bar is approximately:
(A) 1400 mm3
(B) 3500 mm3
(C) 4800 mm3
(D) 9200 mm3
On a cosmic calendar, in which the history of the universe is compressed into one year, how long is the average human life span?
A) 0.2 millisecond B) 0.2 second C) 2 seconds D) 2 minutes E) 2 hours