The time interval during which a nucleus has a 50% probability of decaying is its
a. half life
b. decay time
c. nuclei activation time
d. binding energy time
e. none of the above
A
Physics & Space Science
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A depression on the land surface caused by the collapse of a cavern is called
a. a sinkhole. b. a shrink pit. c. a culvert. d. none of the above.
Physics & Space Science
In a superconductor, the electrical conductivity is infinite below the _________temperature.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
Power: A kilowatt-hour is equivalent to
A. 1000 W. B. 3600 J. C. 3,600,000 J/s. D. 3,600,000 J. E. 3600 J/s
Physics & Space Science
In this perspective view of the solar system, the sizes of the planets are ________ relative to the sizes of their orbits.
A) exaggerated about 1,000 times B) correctly scaled C) exaggerated about 10 times D) exaggerated about 100 million times
Physics & Space Science