Phase changes occur
A) as the temperature decreases.
B) as the temperature increases.
C) as the temperature remains the same.
D) all of the above
E) none of the above
C
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Bacteria reproduce by the process of cell division. This kind of reproduction is referred to as
A) sexual B) unsexual C) asexual D) agamic
What must be the diameter of a cylindrical 120-m long metal wire if its resistance is to be 6.0 ?? The resistivity of this metal is 1.68 × 10-8 ? ? m
A) 0.65 cm B) 0.65 mm C) 0.0325 mm D) 0.065 mm E) 0.325 mm
In a nuclear fission process involving the use of 239Pu fuel, if the approximate average binding energy per nucleon in the product fragments is 8.8 MeV while that of the fuel atom is 8.1 MeV, what approximate net energy is released per fission?
a. 170 MeV b. 270 MeV c. 190 MeV d. 90 MeV e. 50 MeV
In the Drude model of electrical conduction, the current density is directly proportional to
a. the average time interval between successive collisions. b. the number of charge carriers per unit volume. c. the square of the electron charge. d. the electric field present in the wire. e. the product of all four quantities listed above.