Aphoto with a length of 3 inches and a width of 5 inches is enlarged to a poster size. the poster and the photo are similar. the length of the poster is 21 inches. what is the width of the poster? (answers there^^)

J. 35 inches

Step-by-step explanation:

Write a proportion:

3 / 5 = 21 / x

Cross multiply:

3x = 105

Divide:

x = 35

The width of the poster is 35 inches.

Find the scale factor used by dividing the length of the poster by the length of the photo.

21 / 3 = 7

The poster is 7 times the size of the photo.

Now multiply the width of the photo by the scale factor:

5 x 7 = 35

The width of the poster is 35 inches.

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