1

General Science / Re: How does temperature affect the colour of metals?

« on: 02/07/2018 11:01:23 »

Tobey asks:
... why do some metals ... stay colored after they cool?

The colours are due to oxides which have formed during the heating process : the metal has reacted with the oxygen in the air ...


https://en.wikipedia.org/wiki/Tempering_(metallurgy)#Tempering_colors

2

Physics, Astronomy & Cosmology / Re: How is it possible for the Sun to set in the northwest?

« on: 26/06/2018 21:40:51 »

sunset is North East.png (280.8 kB . 835x698 - viewed 329 times)
http://suncalc.net/#/54.5905,-0.6743,5/2018.06.26/21:29

3

Just Chat! / Re: Is Donald Trump a ventriloquist's dummy ?

« on: 05/06/2018 00:46:57 »

And then who's the Ventriloquist ?
Majority of American Citizens.

Revised election results in December 2016 showed that Clinton received nearly 2.9 million more votes than Trump.
Clinton obtained 48.2 percent of the vote while Trump received 46.1 percent, CNN reported in December 2016 ...

http://www.newsweek.com/how-many-voted-trump-president-784019

4

General Science / Re: How does strong sunlight cause colours to fade?

« on: 22/05/2018 09:57:33 »

Energy from the photons is transferred to the electrons which form the chemical-bonds in the dyes, see ... https://en.wikipedia.org/wiki/Photodegradation
https://en.wikipedia.org/wiki/Photodissociation

5

Geology, Palaeontology & Archaeology / Re: Is this fools gold or real gold?

« on: 19/05/2018 23:06:17 »

I know nothing about how to distinguish real gold apart from fools gold ...

If you can see cubic crystals, it's not gold.

https://en.wikipedia.org/wiki/Pyrite#Distinguishing_similar_minerals

6

Marine Science / Re: How do denticles make a shark swim faster?

« on: 15/05/2018 22:07:56 »

... large ... dimples ... definitely reduces turbulence ...

7

General Science / Re: Why am I waking up in the night?

« on: 13/05/2018 02:49:38 »

Why very often as I've just drifted off to sleep do I awake feeling like something has bumped my bed ...
I feel there must be a scientific explanation for this as opposed to some energy force disturbing me.

If you're being startled just after you've fallen asleep, without an external trigger, could be hypnic jerk.

8

General Science / Re: How Can I Change the Mind Of A Flat-Earther ?

« on: 07/05/2018 23:02:20 »

They don't believe in gravity in the same way that we do. They believe that the Earth is accelerating upwards at 9.8 meters per second squared, thus emulating gravity.

Gravity is not exactly 9.8m/s across the entire Earth ...

https://en.wikipedia.org/wiki/Gravity_of_Earth

If it was a disc accelerating it would be constant across Earth's surface.

BTW after a mere decade accelerating at 9.8m/s², disc-Earth would be close to the speed of light.
Colliding with interstellar gas at that speed would irradiate Earth : we'd be cooked.

9

Just Chat! / Re: Puzzles From A Trampolining Upside Down Sheeps Bottom (PFATSB) :-)

« on: 19/04/2018 01:13:37 »

upsidedown.png (165.71 kB . 551x461 - viewed 917 times)[

10

General Science / Re: Do adding more seeds help birds stop eating seeds?

« on: 16/04/2018 01:53:39 »

Something will prey upon the birds, e.g. raptors.
So the bird population will boom & bust ...


http://fractalfoundation.org/OFC/OFC-6-1.html

11

Just Chat! / invention from "catchit" ...

« on: 25/03/2018 15:35:20 »

but it's for dogchit ...

12

Physiology & Medicine / Re: What can you tell me about p3 deletion?

« on: 16/03/2018 13:52:29 »

Petrie or P3 deletion ... only around 180 cases world wide ... any links, or sources of information about this syndrome ...

There is a rare-disease called "3P syndrome", a/k/a "Deletion 3p25" ...

Chromosome 3p- syndrome
Other Names: Del(3p) syndrome; Chromosome 3, monosomy 3p25; Deletion 3p25 

https://rarediseases.info.nih.gov/diseases/3750/chromosome-3p--syndrome

http://www.rarechromo.org/information/Chromosome%20%203/3p25%20deletions%20FTNW.pdf

13

That CAN'T be true! / Re: Would a hose held under water feel less force?

« on: 09/02/2018 05:43:46 »

... if the rate of the water leaving the hose in both conditions is the same ...

I don't think that will be the case: air-resistance is trivial compared to water-resistance,
which will reduce flow from the hose, and consequently less reaction force.

There's also hydro-static force reducing flow from the hose,
( the deeper the hose is held underwater the greater that will be). 

14

Just Chat! / Re: Mother Goddess

« on: 21/01/2018 00:52:00 »

Mother Goddess ... She is the mother of us all, and cares so much.
She is innocent, loving, devotional, nurturing ...Mother Goddess Earth, universe ... galaxy ...

Evidently nurturing mother has killed her babies many times over, see ... https://en.wikipedia.org/wiki/Extinction_event#Major_extinction_events

15

Geek Speak / Re: can IE11 be made to always run in administer mode

« on: 20/01/2018 14:18:46 »

... if you run it administer mode it runs much better and is superior to edge ...

You're trading-off security for convenience : more likely to install malware it encounters.
https://blogs.msdn.microsoft.com/aaron_margosis/2004/06/17/why-you-shouldnt-run-as-admin/

16

Physiology & Medicine / Re: Does religion permanently alter brain connectivity?

« on: 12/01/2018 06:34:51 »

Does religion permanently alter brain connectivity?

It's the other way round : mental-illness makes people more likely to join a religious-cult in the first place.

17

Geology, Palaeontology & Archaeology / Re: What is this shell-shaped object I found in a pond?

« on: 01/01/2018 18:42:52 »

Looks like a bigger version of this ...


http://geoblog.weebly.com/expedition-baltic-sea

https://en.wikipedia.org/wiki/Concretion

18

General Science / Re: How much power does a fan need to have to raise a person?

« on: 26/12/2017 13:00:40 »

I don't think 2 fans are enough for stability : want 4 or more ...

19

Geek Speak / Re: How do I get into Sci-Hup?

« on: 14/12/2017 08:47:27 »

They have a Twitter account.

20

Just Chat! / Seen too many Road-Runner cartoons

« on: 22/11/2017 06:37:36 »

http://www.madmikehughes.com/

Red rocket launch-date 25th November.

Allegedly this is Mike's previous-flight ...

X¬o