A pair of electrons shared by two atoms forms
a. a metallic bond.
b. a double covalent bond.
c. a single covalent bond.
d. an ionic bond.
c
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A copper wire (d 5 1.5 mm) is bent around a tube of radius R 5 0.6 m. The maximum normal strain in the wire is approximately:
(A) 1.25 3 1023
(B) 1.55 3 1023
(C) 1.76 3 1023
(D) 1.92 3 1023
An arrangement of 3 charges is drawn showing the field lines. The first charge has 20 lines going into it. The second charge has 30 lines going out of it. If the net charge of the arrangement is zero, what is the field line situation for the third charge?
A. 50 lines going out B. 50 lines going in C. 10 lines going out D. 10 lines going in E. 600 lines going out to infinity
Whether the Universe is open, closed or flat depends, on the ___________ of the Universe
a. luminosity b. density c. temperature d. radius e. rotation rate
The type of radio wave that produces the least static in a radio receiver is
A) AM. B) FM. C) neither of these