Recent content by pbuk

Is that true in your education system? In the UK that is only likely to be true in the first year of an undergraduate course: in the second year perhaps 25% will be selected from options rising to 50% or more in the final year.

So then children would not be able to access government sites. Or university sites. Or Wikipedia. Or PhysicsForums. Instead, they would only be able to access social media and other content created especially for them, mainly by entities that have a commercial interest in holding children's...

There has been extensive work in the UK on this: the Department for Energy Security and Net Zero (DESNZ) published a study and commenced a consultation in July 2025. The consultation closed in September 2025; the results have not yet been published.

No, they show a lot of deformation. It is impossible to say without measurement how the volume has changed.

...which has deformed due to compression of the vapour as the ice expands.

But your qualitative description ("I put some bottles of water in the freezer and it looks like they shrank") has already been addressed (perhaps they actually expanded but the way they deformed made you think that they had shrunk). You can easily measure the volumes before and after to get...

The question does not imply that Holly was alive 15 years ago. It does imply that Ivy was alive 15 years ago, and so Ivy's minimum age is 15 (or 16 if you do not consider 0 to be a valid age). However this is irrelevant to the answer to the question which is indeed 6.

No, don't go there. Doesn't matter, your site is based in the EU so you need to follow (your local implementation of) EU cookie law. Yes it does. Then what are you using cookies for? Note that the law does NOT say "you need to get consent if you are using cookies for X, Y or Z", it says...

Very forgiving! Some of the more egregious errors in the 10% I looked at (basically the beginning and the end): On the first slide (visible from about 20s in) where he explains that our current understanding of the universe, and in particular the size of the observable universe: is limited by...

I'm not sure how wrong this guy Monroe Pattillo is, or if he is just a bad explainer: .

Yes, and the rest of the SA article seems to check out too. Looks like my skeptic spider sense was over-excited by the publication date!

What is the date on that SA article? And if you missed that, surely the bit about mating a south east migrator with a south west migrator to get a bird that flies due south should have alerted you? Edit: despite publication on 1 April 2022 it seems that the article is genuine o:)

This thread is about sailing boats, that well-known monstrosity has no place here :wink:

Yes, I am not sure why I wrote what I did (now corrected) - I was tired after a long day sailing!

Passwords should be hashed rather than encrypted. Use password_hash with the default bcrypt and automatic random salt but consider increasing the cost option. I haven't looked at your GIT link, I am just inspecting your http responses.