How many nonbonding pairs of electrons are in the following molecule?
H—H
A) 1 pair
B) 6 pairs
C) 0 pairs
D) 8 pairs
E) none of the above
Answer: C
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How much energy is stored in the 50-?F capacitor when Va ? Vb = 22 V?
?
?
a.
0.78 mJ
b.
0.58 mJ
c.
0.68 mJ
d.
0.48 mJ
e.
0.22 mJ
How do head-tail radio galaxies reveal their motion?
What will be an ideal response?
The Tully-Fisher relation exists between the galaxy's luminosity and its:
A) color. B) age. C) rotation. D) mass. E) size.
A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is attached. It is then displaced downward an additional 5.0 cm and released. Its position as a function of time is approximately
A. y = ?0.10 sin 9.9t. B. y = 0.10 cos 9.9t. C. y = ?0.10 cos (9.9t + 0.1). D. y = 0.10 sin (9.9t + 5). E. y = ?0.05 cos 9.9t.