Science and Engineering

Biogas plant - Biogas production

Bio-gas Plant Biogas can be produced by anaerobic digestion with anaerobic bacteria, which digest material inside a closed system, or...

Wooden Boat History Humans have tended to live near water, and it is natural to make use of things that float. Logs or bundles of ...

Helicopter a type of aircraft which derives both lift and propulsion from one or more sets of horizontally revolving overhead rotors. ...

Steam turbine a turbine in which a high-velocity jet of steam rotates a bladed disc or drum. Working and construction when ...

Inverter (ups) At the very end of the 1800s, American electrical pioneer Thomas Edison (1847–1931) went out of his way to demonstrate ...