What is the following sum? Assume x is greater than or equal to 0 and y is greater than or equal to 0 Vx2y3 +2/x3y4 + xy/y
x²y² /y-2xy² /x
2xy Vy + 2xy2 Vx
4xy/x5y8
2xy/xy

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we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v

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