The most multifarious physical changes, thermal, electrical, chemical, and so forth, can be brought about by mechanical work.
Since Galileo, mechanical work, though long under a different name, has been a fundamental concept of mechanics, as also a very important notion in the applied sciences.
After it had been proved that heat must disappear if mechanical work was to be done at its expense, Carnot's principle could no longer be regarded as a complete expression of the facts.
This machinery may be used to work a dynamo, and thus electric light may be generated, or it may drive an electric motor which may perform all sorts of mechanical work.
Again, all forms of water-power, whether it be in the form of the flowing river or the tidal motion of the sea, possess a large amount of potential energy which may be used up to do mechanical work.
Each period is devoted to a different type of mechanical workor drill-work.
A fifth and a sixth lesson are similarly devoted to two other sorts of mechanical work.
All these forms of motion are susceptible of change into one another, and in all the transformations the {99} quantity of mechanical workrepresented by different modes of motion remains invariable.
The practical unit of mechanical workis the kilogramme-metre, the work required to raise the weight of one kilogramme to the height of one metre.
The number of units of mechanical work equivalent to one unit of heat is generally called the mechanical equivalent of heat, or Joule's equivalent, and is denoted by the letter J.
It was not sufficient to find the relation between heat and mechanical work or other forms of energy in one particular case.
In another experiment, made with five elements, the consumption of zinc was found to be 36 milligrammes for every kilogrammeter of mechanical work performed.
The static conditions of the solid, liquid and gaseous states therefore represent mechanical work in so far as mechanical work is a measure of heat.
We must "always remember that with conditions of the movement of matter statical conditions are also given and that these last are not measured in mechanical work.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "mechanical work" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
