it takes skin exactly 1 hour to freeze in - 20 degrees
10-60 minutes (it depends on the weather)
It all depends on what the temperature is.
Onion skin weathering is an ongoing process. How long it would take for a specific rock to completely weather would depend on its size.
wood doesnt freeze
how long idoes it take the weather to change
How long does it take water to freeze on 15 mile winds at 30 degree f
If you dip them into liquid nitrogen (LIN) they will freeze instantly.
depends how cold and what you use to freeze it
Really all it would take, in the case of a cracked casting, is one day or night of freezing temperatures. This of course would not apply to an engine with a closed cooling system, properly winterized, using anti-freeze.
27 hor
3
20 minutes