(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.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change? work power gravitational energy chemical energy

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?