Hydrogen, oxygen and carbon make up about 99% of the average human. I'm going to cheat a little and leave out the other 1%, which is made up of trace elements (that is, stuff there's only a trace of in the body). Then, let's assume an average adult weighs 70 kilograms.
DONâT! Youâll end up with the potato getting steamed in the foil instead of just baked. You may as well just cook it in the microwave. Place the potato directly on the oven rack. Bake for 40 to 60 minutes, depending upon the size of the potato.Potatoes are as hard as a brick when they are raw. By the time itâs cooked youâll be able to squeeze it.he oven needs to be really hot, 400 degrees hot, when you stick the potatoes in it. So before we go any further, go turn the oven on to 400 degrees to preheat. (This could take up to 15 minutes, maybe even longer depending on your oven.). All potatoes need to get washed first. A vegetable scrub brush works beautifully.
Space the potatoes on a rack in the preheated oven so there is at least an inch of space around each potato. In a standard oven you should be able to have three rows with five potatoes in each row. Bake the potatoes for about 50 minutes. Use an oven mitt to remove one potato to test it. The potato is done if it feels soft and has a tender feel when you pierce it with a fork. If the potato is not done, put it back in and cook an additional 10 minutes.