Why was the rate at the center different than the rate along the sides?

The rate at the center was different from the rate along the sides due to factors such as temperature, pressure, or concentration gradients. In many systems, the center may experience more uniform conditions or higher intensity, leading to a faster rate of reaction or change. Conversely, the sides may be affected by boundary conditions or restrictions that slow down the rate. This differential can have significant implications for the overall behavior of the system.