(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.

6–55 refrigerant-134a enters the condenser of a residential heat pump at 800 kpa and 358c at a rate of 0.018 kg/s and leaves at 800 kpa as a saturated liquid. if the compressor consumes 1.2 kw of power, determine (a) the cop of the heat pump and (b) the rate of heat absorption from the outside air.

When does your body conduct current more readily?

Amass weighing 24 pounds, attached to the end of a spring, stretches it 4 inches. initially, the mass is released from rest from a point 8 inches below the equilibrium position. find the equation of motion. (use g = 32 ft/s2 for the acceleration due to gravity.)