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Descrição
Mapa Mental por edwin puenayan, atualizado more than 1 year ago
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Criado por edwin puenayan
mais de 9 anos atrás
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THE EVOLUTION OF
ELECTRIC POWER
- in the early 1800´s the firs
time lectricity was available
for cities lke new york
- Even thongh ligth bulos were
produced the network was not
ready yet for mass distriburion
- electricity presented some danger because
it could nor be seeen as is travelled through
the wires so it was important to wam
people about the hazards of this amazing
new invention
- To avoid oxygen from burhing the
filamen it wasextracced from the bulb
creating a vacuum
- today´s light bulbs are
basically the same but the
marerials have changt
- today´s light bulbs are
basically the same but the
marerials have changt
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