What is the best explanation for the observation that the electric charge on the stem became positive as the charged bee approached (before it landed?

Which notation is used to represent an alpha particle? a. b. c. d.

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.

The total amount of energy contained in an object