Final answer:
The provided question lacks the necessary details to determine the elevator speed for miners after 19 seconds. A typical physics problem involving elevators would require initial velocity, time, and acceleration to calculate speed using kinematic equations.
Step-by-step explanation:
The question provided does not contain sufficient information to calculate the speed of the elevator for miners after 19 seconds. To determine the speed, we would need either the initial speed of the elevator and the acceleration (which could be constant or variable) or a description of how the elevator's speed changes over time. In problems like this, we usually use kinematic equations to find the velocity of a moving object when we know its initial velocity, acceleration, and the time elapsed. Meanwhile, if we're examining an elevator's physics, we might involve concepts like tension, acceleration, kinetic energy, work, and power, all of which are fundamental in mechanics, a branch of physics.
Based on the information about elevator acceleration provided in the reference text, such as the elevator accelerating downward with a rate of 1.20 m/s², it seems that the primary focus of these questions is on understanding the forces and energetics associated with elevator motion.