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Sir Issac Newton defines laws of gravity
1.what goes up must come down 2. for every action there is a opposite reaction 3. gravity is a force that pulls us to the ground,,, cause without gravity we would float into space Read more: http://wiki.answers.com/Q/What_important_contributions_did_Sir_Isaac_Newton_make#ixzz1yH5aqKil -
Ben Franklin's kite experiment
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James Watt improves steam engine process
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Volta creates first electric cell
uses copper, zinc, and salt water -
Faraday passes electric current through copper
uses a magnet -
James Joule develops measurement of force (J)
J stands for 1 Joule -
Thomas Edison perfects Lightbulb
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Westinghouse creates 1st AC power plant at Niagara Falls
Adams power plant -
Rontgen discovers xrays
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Max Planck develops quantum theory
