Which describes how scientific models are used

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

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.)

If frequency goes down, what happens to wavelength? does it get shorter or longer?