human
What is lenght of a car would need to be so that it would touch the floor in the middle because of the curvature of the earth ?
gpt
For this question, let's assume the earth is a perfect sphere of 6371\*10^3 meters in radius (6371 km), and a typical passenger sedan has the average ground clearance of 150\*10^-3 meters (15 cm).

Using the arc chord length equation in Julia code: 

```julia
earthRadius = 6371e3
carClearance = 150e-3
wheelDistance = 2*sqrt(2*earthRadius*carClearance-carClearance^2)
```
we get the result of ~2765 meters as the distance between the front and back wheels, which would be the absolute minimum distance of the length of this hypothetical car.
human
Can you rewrite that equation in python code instead of Julia code?  And write it as a function.
gpt
Sure, here's a Python version of this equation written as a function and a usage example:
```python
# math or similar library reqired for square root and power operations
import math

def car_touching_planet_length(car_clearance_meters, planet_radius_meters):
    wheel_distance = 2*math.sqrt(2 * planet_radius_meters * car_clearance_meters - math.pow(car_clearance_meters, 2))
    return wheel_distance

# Example usage:
try: 
    earth_radius = 6371e3
    average_sedan_clearance = 150e-3
    earth_car_touching_planet_lenght = car_touching_planet_length(average_sedan_clearance, earth_radius)
    car_rounded = round(earth_car_touching_planet_lenght,2)
    print(f"Length of a car touching earth because of the planet curvature is about {car_rounded} meters")
except ValueError as e:
    print(e)
```