Consider a hypothetical crystalline metal. as the temperature is raised from 800 to 1000k, the lattice parameter increases 0.05% due to thermal expansion and -the density decreases by 0.16%. this density decrease is due to the combination of thermal expansion and vacancy creation a) what is the expected percentage decrease in density due to normal thermal expansion alone? thus you can calculate volume per unit cell increase by 3 times the lattice parameter increase) (2) (hint: for simplicity in calculation, the expansion of unit cell is relatively small in this case, b) evaluate the net density decrease due to vacancy production alone. (2) c) if the vacancy concentration at 800k is 106, estimate the activation energy for vacancy production.

Did the proton move into a region of higher potential or lower potential? did the proton move into a region of higher potential or lower potential? because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of higher potential to a region of lower potential.because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of lower potential to a region of higher potential.because the proton is a positive charge and it slows down as it travels, it must be moving from a region of higher potential to a region of lower potential.because the proton is a positive charge and it slows down as it travels, it must be moving from a region of lower potential to a region of higher potential.request answerpart bwhat was the potential difference that stopped the proton? express your answer with the appropriate units.î”v î” v = nothingnothingrequest answerpart cwhat was the initial kinetic energy of the proton, in electron volts? express your answer in electron volts.ki k i = nothing ev request answerprovide feedback