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Topics	Replies	Views	Last post
Physics, Astronomy & Cosmology \ Spinning a cassette player with a rope: same sound? Started by myuncle	3	798	Last post by evan_au 09/04/2023 22:26:06
Technology \ Has anyone exploited the balancing half-sphere for electricity production? Started by myuncle	6	1056	Last post by Kryptid 04/02/2023 21:04:01
Technology \ Electricity Generation via treadmill. Can one person generate enough? Started by tackem	10	1425	Last post by alancalverd 04/02/2023 10:22:11
Physics, Astronomy & Cosmology \ Which weighs more, a litre of ice or a litre of water? Started by The Scientist	42	44639	Last post by Peter11 23/11/2022 14:04:51
Physics, Astronomy & Cosmology \ Electrons made of photons? Started by myuncle	6	1853	Last post by yor_on 03/03/2022 07:56:38
Physics, Astronomy & Cosmology \ speed of projectiles inside a free falling vacuum chamber Started by myuncle	9	2137	Last post by yor_on 30/07/2021 10:13:43
New Theories \ What is space? Started by 0	208	52514	Last post by captcass 27/05/2021 18:13:58
Technology \ soundproofing in a 3d printed house? Started by myuncle	18	3806	Last post by evan_au 10/05/2021 22:03:36
Physics, Astronomy & Cosmology \ Watching, hearing, playing in a spaceship travelling near speed of light Started by myuncle	24	3934	Last post by Petrochemicals 16/04/2021 23:01:53
Technology \ Can we use convection to move desalinated seawater inland? Started by myuncle	25	4209	Last post by alancalverd 11/04/2021 10:18:26
Physics, Astronomy & Cosmology \ What falls faster: heavy or light objects? Started by EvaH	20	5377	Last post by Bored chemist 09/10/2020 23:56:45
Technology \ Can choppers or drones suck the smoke and blow it back to the wildfires? Started by myuncle	10	2924	Last post by evan_au 02/10/2020 02:25:07
Technology \ Is it possible to tow a rocket into space from space? Started by myuncle	20	4127	Last post by evan_au 16/08/2020 04:21:46
Physics, Astronomy & Cosmology \ Why are we not covered in starlight? Started by Harri	6	1974	Last post by Halc 28/07/2020 04:50:42
Technology \ Could we recycle plastic waste to make bricks and moulds? Started by melaniejs	7	10345	Last post by Edwina Lee 23/05/2020 07:38:06
Technology \ Can a spinning solar plane produce energy? Started by myuncle	21	19183	Last post by alancalverd 12/04/2020 12:20:29
New Theories \ Can scientific beliefs be compared to religous dogma? Started by thedoc	153	28959	Last post by Kryptid 08/11/2018 16:51:44
Physics, Astronomy & Cosmology \ Can gravitational waves be detected with electron microscopes? Started by myuncle	18	3804	Last post by evan_au 22/10/2018 21:15:10
The Environment \ Bring seawater to the desert? Started by myuncle	6	2852	Last post by myuncle 05/09/2018 01:24:57
Technology \ Should all houses be prefab like lego? Started by myuncle	5	2238	Last post by Colin2B 29/07/2018 22:04:21