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The work done is given by the dot product of the two vectors, where the result is a scalar. When the force F is constant and the angle θ between the force and the displacement s is also constant, then the work done is given by: = If the force is variable, then work is given by the line integral:
Work done by force fields can be done indefinitely slowly, so as to approach the fictive reversible quasi-static ideal, in which entropy is not created in the system by the process. In thermodynamics, non-mechanical work is to be contrasted with mechanical work that is done by forces in immediate contact between the system and its surroundings.
The work can be done, for example, by electrochemical devices (electrochemical cells) or different metals junctions [clarification needed] generating an electromotive force. Electric field work is formally equivalent to work by other force fields in physics, [1] and the formalism for electrical work is identical to that of mechanical work.
An average human worker can provide work good for around 0,9 hp (2.3 MJ per hour) [18] while a machine (depending on the type and size) can provide for far greater amounts of work. For example, it takes more than one and a half hour of hard labour to deliver only one kWh – which a small engine could deliver in less than one hour while burning ...
This term may as well be used for a group of computers that are connected and work together, in particular a computer network or computer cluster. Computer-aided design – (CAD) the use of computer systems (or workstations) to aid in the creation, modification, analysis, or optimization of a design. [46]
Manual labour (in Commonwealth English, manual labor in American English) or manual work is physical work done by humans, in contrast to labour by machines and working animals. It is most literally work done with the hands (the word manual coming from the Latin word for hand ) and, by figurative extension, it is work done with any of the ...
Play the classic trick-taking card game. Lead with your strongest suit and work with your partner to get 2 points per hand.
Getting Things Done (GTD) is a personal productivity system developed by David Allen and published in a book of the same name. [1] GTD is described as a time management system. [2] Allen states "there is an inverse relationship between things on your mind and those things getting done". [3] [a]