Final answer:
The rate of change of the particle's position at a specific second is 2.0 meters per second.
Step-by-step explanation:
The rate of change of the particle's position at a specific second can be found by taking the derivative of the position function with respect to time. In this case, the position function is given as s(t) = 4.0 + 2.0t, where s represents the position in meters and t represents the time in seconds. Taking the derivative of this function, we get the velocity function v(t) = 2.0, which represents a constant velocity of 2.0 meters per second. Therefore, the rate of change of the particle's position at any second is 2.0 meters per second.