A tram (also known as a streetcar or trolley in North America) is a train that runs on tramway track on public urban streets; some include segments of segregated right-of-way. The lines or networks operated by tramcars as public transport are called tramways or simply tram/streetcar.
invented by James Blyth
A wind turbine is a device that converts the wind’s kinetic energy into…
invented by William Robert Grove
A fuel cell is an electrochemical cell that converts the chemical energy of a…
invented by Frederick Ransome
A rotary kiln is a pyroprocessing device used to raise materials to a high…
invented by Paul Vieille
Poudre B was the first practical smokeless gunpowder created in 1884. It was…
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