A) Jack works out 25 x 14.2 without a calculator. Here is his working. 10 x 14.2 = 14.20

20 x 14.2 = 28.40

5 x 14.2 = 71

25 x 14.2 = 28.40 + 71 = 99.40

Jack's working is incorrect.

Identify and (only) correct the lines containing a mistake to work out

the correct answer.

[3]

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

d is the answer

step-by-step explanation: