A boulder has 100 N applied to it by a hiker in order to move it out of the trail. If the acceleration is 0.4 m/s2 then what is the boulder’s mass?

Gunpowder residue is most likely to show up where on a shooters hands

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?