I have a 20x20cm piece of foil with a circular hole of diameter 1cm in the centre.
If I slowly stretch the foil both horizontally and vertically, what happens to the size of the hole?
Does the size of the hole change? If the foil doubles in size to 40x40cm, will the hole be of diameter 2cm? Do any factors affect the size of the hole? The temperature of the room, the speed at which I stretch the foil?