Exactly what it says on the tin: how thick would a layer of spider silk need to be to stop each of the following bullets from passing through?
I mean "on a separate basis", by the way; obviously, the thickness required to stop a .22 Short round is going to be a lot less than that for a .30-06 Springfield. Obviously, the thickness required to stop a .30-06 Springfield round would stop the .22 Short ceteris paribus; I'd just like to know what the minimum is to stop each of the above.
Assume the following material properties for this spider silk:
1300 megapascals tensile strength
1.3 grams per cubic centimeter density
120 megajoules per cubic meter energy density
Capable of stretching 5 times its relaxed length without breaking
111 megajoules per cubic meter toughness
Also, assume that it's a single layer of spider silk, rather than a bunch of spaced sheets, and that the bullets are normal ones for their caliber, rather than armor-piercing, high load, etc.