Energy can be transformed from one form to another. the diagram shows one such process. which energy transformation is representedin the diagram?

nuclear to thermal and radiant
nuclear to electrical and chemical
chemical to nuclear and radiant
chemical to electrical and nuclear

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

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.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration