A: assume that aluminum is evaporating from a source at the rate of 5 x 1020 atoms/sec. make an estimate of the time it would take to form a 2000á layer on a 4" wafer that is 150mm distant [and perfectly square to the source] b: if the evaporating source used above is charged with 5 grams of aluminum- how long could it evaporate at that rate?

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

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

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?