He aided in the discovery of the cog and gear system, which later added into the creation of machinery in the Industrial revolution.
His flying machines gave a new perspective to engineering.
Answer:
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The most rudimentary form of painting with the brushes could be related to watercolor painting, as it is the primary step in the painting field, to get accustomed with the colors and the strokes of the brushes. This form of work is mostly found effective, to a great extent, considering the fact that it allows you to learn the strokes with a paint brush, before proceeding onto more daunting techniques. At the same time you also get the rough idea of mixing the paints, to get the desired effect. On discussing about this art we come across several aspects, which can be debated upon or could be put aside as the shortcomings or benefits of the art.
D: Circuit
A device that uses electricity to perform a task is called a(n) (electrical) circuit.
