An insulated wire of diameter 1.0 mm and negligible resistance is wrapped tightly around a cylindrical core of radius 5.0 cm and length 30 cm to build a solenoid. what is the energy stored in this solenoid when a 0.20 a current flows through it?

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

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.