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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	791	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	1054	Last post by Kryptid 04/02/2023 21:04:01
Physics, Astronomy & Cosmology \ Electrons made of photons? Started by myuncle	6	1849	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	2131	Last post by yor_on 30/07/2021 10:13:43
Technology \ soundproofing in a 3d printed house? Started by myuncle	18	3798	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	3925	Last post by Petrochemicals 16/04/2021 23:01:53
Technology \ Can we use convection to move desalinated seawater inland? Started by myuncle	25	4197	Last post by alancalverd 11/04/2021 10:18:26
Technology \ Can choppers or drones suck the smoke and blow it back to the wildfires? Started by myuncle	10	2920	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	4105	Last post by evan_au 16/08/2020 04:21:46
Technology \ Can a spinning solar plane produce energy? Started by myuncle	21	19155	Last post by alancalverd 12/04/2020 12:20:29
Physics, Astronomy & Cosmology \ Can gravitational waves be detected with electron microscopes? Started by myuncle	18	3797	Last post by evan_au 22/10/2018 21:15:10
The Environment \ Bring seawater to the desert? Started by myuncle	6	2850	Last post by myuncle 05/09/2018 01:24:57
Technology \ Should all houses be prefab like lego? Started by myuncle	5	2234	Last post by Colin2B 29/07/2018 22:04:21
Physics, Astronomy & Cosmology \ Who decided North was up on maps? Started by myuncle	14	3947	Last post by 0 01/05/2018 11:46:02
The Environment \ Can you stop a hurricane with a giant inflatable balloon? Started by myuncle	6	3151	Last post by yor_on 10/09/2017 18:13:33