Without transistors, computers
A. could not be made.
B. could not be easily programmed.
C. could not use digital logic.
D. would be much larger.
Answer: D
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Parallax is the apparent change in location of an object due to the motion of the observer
a. True b. False Indicate whether the statement is true or false
The diffraction limit is a limit on:
A. A telescope's size. B. A telescope's angular resolution. C. A telescope's spectral resolution.
Suppose there are a million habitable planets in our galaxy, that one in ten are habitable, that one in a thousand planets with life had at some point had an intelligent civilization, and that one in a hundred civilizations that has ever existed is
in existence now. Given this, how many civilizations are in existence now? A) 10 B) 1 C) 1000 D) 100
A charge of 25 nC is uniformly distributed along a circular arc (radius = 2.0 m) that is subtended by a 90-degree angle. What is the magnitude of the electric field at the center of the circle along which the arc lies?
a. 81 N/C b. 61 N/C c. 71 N/C d. 51 N/C e. 25 N/C