Work involves energy and force. In this case, the mother swan carries the two baby swans across the water. The mother is using its energy to exert force upwards to carry the weight of the two baby swans, and also exerting force to propel themselves across the water.
work is being done when you use energy
Yes. The work is being done by whoever is pushing rather then the engine, but work is being done. Any time a force is applied through a distance, work is being done.
Sleep, do work around the house, spend time together, basically get done what they can get done with the baby is sleeping
work can only be done by a living being
It is work that is being done in a laboratory.
Yes it is.
you know when work is done when it's finished and checked and approved by someone.
Yes it is being done, if the person doing it is doing it as part of a paid job or because they run a business and the letter is needed for the business. If it is being typed for school it may also be considered work, but of a different kind. And from the view of physics, since energy is being expended by the person typing, and perhaps by the machinery being used, work is being done. However, if you are at work and typing a letter to your grandmother, that is not the kind of work you are being paid for and your employer would say work is not being done.
you apply a force to an object
The work being done will be increased if you pick it up instead of dragging it due to the friction.
Of corse,potential energy of pencil is increased.Therefor work done