Derek Freeman

Retired Teacher

[Derek Freeman @DerekFr73368781]

@glynhudson I thought you were ditching 'X' and switching to 'Bluesky'! What happened?

[Derek Freeman @DerekFr73368781]

@plumbers_urban @Protons4B is an authority on this

[Derek Freeman @DerekFr73368781]

@betateachpod @plumbers_urban @SuperiorPlumb11 @howsieboyitsme @ajdunlop @Damon_BPHR @plumbers_urban only serve Surrey. I live in Hastings

[Derek Freeman @DerekFr73368781]

@jankrib @richjohnson905 @ProfBrianCox https://t.co/wcRqwhX2Rp

[Derek Freeman @DerekFr73368781]

@jankrib @richjohnson905 @ProfBrianCox Why does the wave function collapse under observation? Light can travel through media without losing its wave function

[Derek Freeman @DerekFr73368781]

@plumbers_urban @SuperiorPlumb11 @howsieboyitsme @betateachpod @ajdunlop @Damon_BPHR In your experience, if you had to make a choice, which Heat Pump would you say was the best?

[Derek Freeman @DerekFr73368781]

@SuperiorPlumb11 @plumbers_urban @howsieboyitsme @betateachpod @ajdunlop @Damon_BPHR Why are you frustrated with Vaillant?

[Derek Freeman @DerekFr73368781]

@Protons4B @Damon_BPHR Could you clarify, for HP units no larger than 0.6 cubic metres, then Planning permission is not required. Your wordpress article cites the maximum permitted HP size is 0.7 cubic metres

[Derek Freeman @DerekFr73368781]

@pickover If you set-up a detector to see which slit each particle goes through, they behave like particles and do not produce an interference pattern. However, if you switch off the detector, they behave like waves and produce an interference pattern. This behaviour remains unexplained

[Derek Freeman @DerekFr73368781]

@pickover The voltage across the 100W bulb will be 75V and the voltage across the 60W will be 45V, therefore, the 100W bulb will glow brighter, since it consumes more power

[Derek Freeman @DerekFr73368781]

@paz565 @Churchman_A I'd like to know what the mix is too - unless it's a trade secret? I'm guessing it's NHL3 mixed with sharp sand and maybe a bit of hydrated lime....

[Derek Freeman @DerekFr73368781]

@Churchman_A May I ask your opinion - is it not preferable to have the UFH pipes set in the middle of a 100mm screed rather than at the bottom as in your picture?

[Derek Freeman @DerekFr73368781]

@SteveMYorks I have a self-build near Burwash using modular timber/strawbale panles from @Ecococon. I would like to plaster the internal walls with clay. I don't suppose you would be interested in doing it?

[Cliff Pickover @pickover]

Physics humor illustrating relationships among volt, amp, and ohm.

[Derek Freeman @DerekFr73368781]

@pickover The current (4/3A) is the same around the circuit but there will be a larger Voltage drop (75V) across the 100W bulb and it will therefore glow brighter as it consumes more energy than the 60W bulb (45V)!

[Derek Freeman @DerekFr73368781]

@notmandatory @JME2231 @Arch_Revival_ Thank you for posting this!

[ClayworksClayPlaster @UKClayworks]

Clay has the ability to move with traditional oak frames, instead of cracking like a cementitious or gyspum based product.
https://t.co/zuPZS6iXeA