A security system uses sensors at every door and window which will set off an alarm if any one of them is opened. There is also a keypad by an entry door to
turn on or turn off the system. Describe how these components can be wired in a
combination circuit to provide the needed security.

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)