Q1. In a particular region of Earth's atmosphere, the electric field above Earth's surface has been measured to be 154 N/C downward at the altitude of 270m and 174 N/C downward at an altitude of 420m. compute the volume charge density of the atmosphere, assuming it to be uniform between 270 and 420m. (Hint: You may neglect the curvature of Earth. Why?)

Q2. A meter stick, sitting on a frictionless table top, is struck by a wad of clay with a force, F = 4.0 N at an angle. The meter stick will rotate in the plane of the table. Conclude the magnitude of the torque about the axis of rotation located at the pivot point at the center of the stick.