A scientist predicts that it will rain tomorrow. What might cause this prediction to be inaccurate?
A. The movement of the Moon
B. The movement of Mars around the Sun
C. An increase in highway traffic
D. A change in wind patterns

(a) calculate the activation energy, qv, for vacancy formation in silver, given that the equilibrium number of vacancies at 1073k is 3.6 x 1023 m-3. the atomic weight and density (at 1073k) of for silver are, respectively, 107.9 g/mol and 9.5 g/cm3.