Suppose the elevator is currently on the 10th floor and is moving at a constant speed. It takes approximately 10 seconds to travel one floor. Given this information, how long will it take for the elevator to arrive if you are currently waiting on the 1st floor?

Person B (physicist 2):

To solve this problem, we can use the following formula:

```

time = (final position - initial position) / speed

```

In this case, the initial position is the 1st floor, the final position is the 10th floor, and the speed is 1 floor every 10 seconds. Plugging these values into the formula, we get:

```

time = (10 - 1) / 1 = 9 seconds

```

Therefore, the elevator will arrive at the 1st floor in 9 seconds.