The bottom of a ladder must be placed 6 feet from a building. The ladder is 12 feet long. How far above the ground does the ladder touch the wall?

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what grade level is this? need to know so i can look in my old textbooks!

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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

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.