Work=f.d
Work=100*50 = 500
Power = work/time = 500/4
=125 watt
Water and wind cause mechanical weathering and produce angular rocks, sheer canyon walls, and pebble-covered surfaces.
I think that mechanism is called a <em>"lens turret"</em>.
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Answer: On December 20th, 1951 in Idaho, United States.
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The world's first experimental nuclear power plant was the Experimental Breeder Reactor Number One (EBR-I), which was built in a desert in Idaho, United States.
This reactor made history when, on December 20th, 1951, four 200-watt light bulbs were illuminated by means of atomic energy, specifically by nuclear fission reaction.