The greenhouse effect becomes a problem

a. when there is an increase in solar radiation.
b. when there is an increase in the amount of greenhouse gases in the atmosphere.
c. when green plants produce too much oxygen, increasing the amount of oxygen in the atmosphere.

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.)