A3kw kettle boils water in 4 minutes. does this use more electrical energy than a 150w fridge left on for 1 hour?

What is the equation for electrical work?

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.

70 give a real life example showing how sensory neurons work with the motor neurons