To operate properly, superconductors must be kept below a critical temperature. The highest critical temperature for currently available superconductors is about
A. 10 K.
B. 300 K.
C. 200 K.
D. 100 K.
E. 25 K.
Answer: D
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Instructions: On occasion, the notation 
will be a shorthand notation for 
.
Given that 
and 
, what is 
?
A.
B.
C.
D.
E.
