the amount of pressure created when you face plant on concrete
50 psi
550 lbs. of pressure
It takes about 8 pounds of pressure to break the human jaw
75 pounds of succinct concentrated opposing downward pressure will break almost any human bone
It takes about 7 pounds of pressure to break an elbow according to the UFC
fibula tibula
Look on Mythbusters. They have a whole episode about duct tape.
It is not so much as how much pressure as where the pressure is applied. If you keep the egg upright and try to apply pressure at the top and bottom, the egg won't break as easily as much as when you apply it in the middle. The shape of the egg gives greater tensile strength to the ends but the middle is comparitively fragile.
Take him to the doctor. Are you stupid or something?
"depends on thee bone. Copperhead_51 " That's wrong. As long as there would be no gas in something, the thing cannot break under any kind of pressure (unless you have pressure equivalent to a sun or blackhole). At some pressure, chemicals can start to break down, but your bones would still not break.
It would only take about 30 pounds of pressure per square inch to break a human neck. At 25 pounds of pressure, it causes instant unconsciousness.
So for you femur bone, 2-3 elephants could stand on it w\out it breaking! Amazing right?