A6.0-m board is leaning against a wall. a 28° angle is formed with the wall what is the height above the ground where the board makes contact with the wall? (in meters)

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples