Which one of the following is a metallic conductor at room temperature but a superconductor at 18 K?
A) diamond
B) graphite
C) fullerene
D) potassium fulleride
Correct Answer:
Verified
Q45: Silica (SiO2)can be prepared from silicon ethoxide
Q46: What is a cermet?
A)boron nitride/epoxy
B)ceramic-metal composite
C)ceramic-polymer composite
D)silicon
Q47: What is not part of the sol-gel
Q48: Why are ceramics so much more brittle
Q49: Which has been found to be a
Q51: What is the sol-gel process?
A)a series of
Q52: Which combination of semiconductors can be employed
Q53: According to molecular orbital theory,materials with completely
Q54: Why are ceramics superior to metals as
Q55: What structural features appear necessary for superconductivity
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