In relativity theory, Einstein introduced mass as a new type of energy to the mix. Beforehand, the mass of something in kilograms was just a measure of how much stuff was present and how resistant it was to being moved around.
Set the broiling pan in the oven once the broiler has warmed up. Make sure the sausage is positioned about seven to nine inches below the heat. Cook for 16 to 20 minutes total, turning the brat 90 degrees every four to five minutes so that it cooks evenly on both sides.
In my experience, the secret is simply patience. How long to grill bratwurst depends on how you grill them. You can throw them straight on the grill which will take about 25-30 minutes or boil the brats in beer, wine or water for about 20 minutes. After boiling, then they are grilled for 4-6 minutes. Boiling them first (also called par-poaching) in beer first improves the flavor so dramatically its almost a sin just to throw them straight on the grill. Regardless, brats take a little while to cook thoroughly.