How is an energy-saving light bulb more efficient?
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What are "energy" and "work" ?
Started by The ChampBoard Physics, Astronomy & Cosmology |
Replies: 108 Views: 93136 |
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If we put a mirror millions of light years away and reflected earth, could we see what earth looked like millions of years ago?
Started by thedocBoard Physics, Astronomy & Cosmology |
Replies: 9 Views: 24183 |
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Can matter in a vacuum create dark energy and dark matter effects?
Started by GoscienceBoard Physics, Astronomy & Cosmology |
Replies: 1 Views: 16223 |
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What is "light" pressure?
Started by sorincosofretBoard Physics, Astronomy & Cosmology |
Replies: 34 Views: 46715 |
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What is Time? If there was no light would Time cease to be?
Started by londounkmBoard Physics, Astronomy & Cosmology |
Replies: 328 Views: 167359 |
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