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How to create a spark to light a campfire using a wick and chemicals without explosion?
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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: 29071 |
20/05/2018 00:53:37 by raf21 |
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What is "light" pressure?
Started by sorincosofretBoard Physics, Astronomy & Cosmology |
Replies: 34 Views: 53962 |
13/02/2018 19:46:54 by Bill S |
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What is a halogen light bulb? What halogen is used and why is this better?
Started by chrisBoard Technology |
Replies: 4 Views: 24121 |
02/02/2010 11:17:45 by Mazurka |
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Is solar energy the same as light energy?
Started by FeliciaBoard Technology |
Replies: 10 Views: 44461 |
27/01/2023 00:00:13 by Bored chemist |
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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: 185197 |
05/08/2021 23:30:04 by gem |