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4 x 4 1/2 = 18

4 x 4 1/2 = 18

4 1/2 - 2 = 2.5

8 3/4 x 2.5 = 21 7/8

18 + 18 + 21 7/8 = 57 7/8

B : 57 7/8

i think the answer is b.

step-by-step explanation:

not 100% sure though.

step-by-step explanation:

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