Genetics is the most important factor that affects your physical fitness. true or false ?

If a clock aboard a space ship traveling at 0.900 c of the speed of light relative to earth chimes once at the beginning of the hour and again when it reads one hour later, how much time would an observer on earth say elapsed between the two chimes?

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

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?