A1 to Goswick

Here we are hammering down the A1 from Edinburgh to Goswick, but ...

What can you tell about the horizon & how flat the earth is?
What speed was the car is travelling at, going by the shutter speed and standard width of one fence post?
How many blips/shots were required to get the fence post centred in the frame (nearly!)?

Aaah the mathematics and science of photography.
A pity the same can't adequately explain the golf swing, or mine in particular, given that was the purpose of the journey today! Until next time ...!