7. What element burns in the center of the star at 3.5 billion degrees F?

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

In a good thermo flask the main cause of heat loss is