If, at the instant of fission, the Ba and Kr fragments are spherical and just barely in contact,
what is the electrostatic potential energy of these two fragments? (1 eV = 1.60 × 10-19 J, e = 1.60 × 10-19 C, 1/4??0 = 8.99 × 109 N ? m2/C2 )
A) 270 MeV B) 250 MeV C) 230 MeV D) 260 MeV E) 240 MeV
B
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The main reason that gamma photons are more penetrating than either alpha particles or electrons is that
A. They are uncharged. B. They have no rest mass. C. They travel at speed c. D. They have more energy than electrons. E. They don’t ionize atoms as electrons do.
The _____ of quasars imply that they must be at great distances, some farther away than any known galaxy
A) large redshifts B) small redshifts C) large blueshifts D) small blueshifts
The part of the mantle located directly below the lithosphere is called the ______________
a. stratosphere b. Mohorovicic discontinuity c. mesosphere d. asthenosphere
In water, does the molecule lysergic acid diethylamide act as an acid, a base, neither or both?
A) acid B) base C) neither an acid or a base D) both as an acid and as a base