Two thin 80.0-cm rods are oriented at right angles to each other. each rod has one end at the origin of the coordinates, and one of them extends along the +x-axis while the other extends along the +y-axis. the rod along the +x-axis carries a charge of −15.0 µc distributed uniformly along its length, and the other rod carries +15.0 µc uniformly over its length. find the magnitude of the net electrical force that these two rods exert on an electron located at the point (40.0 cm, 40.0 cm). (e=1.60×10−19 c, ϵ0=8.85×10−12 c2/n · m2)

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

i'm on my way to history not a mistory.