> A needle is a simple object, but finding one in a pile of hay takes a lot of work.
1. Gather all the hay in multiple trash bags (this assumes that the needle remains with the hay and doesn't fall out)
2. After gather the hay, use a roller-magnet pickup tool over the area the hay was at to find the needle if it fell out of the hay (assumes needle is made of ferrous magnetic material)
3. Place each bag, one by one, inside the torus of a CT scanner. Turn on CT scanner.
4. Remove bag of hay. Check inside of CT scanner torus for needle.
5. Repeat as needed with other bags.
Alternatively, one could set the hay pile on fire, then run over the ashes with the magnetic pickup tool.
1. Gather all the hay in multiple trash bags (this assumes that the needle remains with the hay and doesn't fall out)
2. After gather the hay, use a roller-magnet pickup tool over the area the hay was at to find the needle if it fell out of the hay (assumes needle is made of ferrous magnetic material)
3. Place each bag, one by one, inside the torus of a CT scanner. Turn on CT scanner.
4. Remove bag of hay. Check inside of CT scanner torus for needle.
5. Repeat as needed with other bags.
Alternatively, one could set the hay pile on fire, then run over the ashes with the magnetic pickup tool.