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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Physics’ Category

Why are the Units for Thermal Conductivity W/mK?

Posted by jpluimers on 2026/08/21

Related to Thermal conductivity – Wikipedia and List of thermal conductivities – Wikipedia is [Wayback/Archive] Why are the Units for Thermal Conductivity W/mK?

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Posted in LifeHacker, Mathematics, Physics, Power User, science | Leave a Comment »

Artemis II – WDR 2

Posted by jpluimers on 2026/02/20

Edit 20260221: the below WDR 2 link has been renamed into [Wayback/Archive] Artemis II – Launch with Launch T0: 2026-03-07 01:29:00 UTC (yup, that T0 is T-zero, not T-oh) which the Americans date as 206-03-06 as they use local EST time which is only valid at their east coast.


Artemis II testing and launch videos, including timeline, can be viewed from [Wayback/Archive] Artemis II – WDR 2.

Yesterday, as part of the launch vehicle system tests, the second wet dress rehearsal was performed.

Somewhere the next few weeks, a launch is anticipated.

Via: [Wayback/Archive] Post by @marijkelouise.bsky.social — Bluesky

--jeroen

Posted in LifeHacker, Physics, Power User, science | Leave a Comment »

William Le’s Perpetual Motion Machine ver.2 – (plz visit my Amazon sto – LovelyWings)

Posted by jpluimers on 2025/05/12

Want: [Wayback/Archive] William Le’s Perpetual Motion Machine ver.2 – (plz visit my Amazon sto – LovelyWings

I think I like the transparent version most, but the wood versions (yellow or brown) of course have more mystery.

There are more products in [Wayback/Archive] Wooden Kinetic Sculpture for Art Lovers – LovelyWings.

You can buy some of them at [Wayback/Archive] Amazon.com: LovelyWings, for instance the brown version of the [Wayback/Archive] Amazon.com: Perpetual Motion Machine – Infinitive Marble Machine – William Le’s Perpetual Motion Simulator : Handmade Products.

Via: [Wayback/Archive] You can’t hide the batteries when it’s transparent! – YouTube

--jeroen

Posted in Development, Electronics Development, LifeHacker, Physics, Power User, science | Leave a Comment »