Example of newton’s law of universal gravitation…

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

Which sound characteristic is not affected by the relative motion of an object

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.