Superconductivity was discovered by:
a. Volta.
b. Ohm.
c. Onnes.
d. Bednorz and Müller.
c
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Recalling that iron lies at the lowest point of the "nuclear energy curve," which of the following nuclear reactions would "release" [that is, convert to other forms] nuclear energy from iron?
A) Fusion B) Fission C) Both of the above. D) None of the above. E) This is the wrong answer.
How do the Martian polar caps differ from Earth's?
A. They are composed of frozen water and carbon dioxide. B. They change size and shape with the seasons. C. They contain a large fraction of the planet's water. D. They contain a record of the planet's climate history.
An absorption spectrum is also called a bright-line spectrum
Indicate whether the statement is true or false
Earth's oceanic crust ranges in thickness from about
a. 98 to 140 km. b. 5 to 11 km. c. 19 to 98 km. d. 18 to 26 km.