Things you always wanted to know the answer to [Vol. 4]

Things you always wanted to know the answer to [Vol. 4]

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glazbagun

14,279 posts

197 months

Friday 6th December 2019
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The Mad Monk said:
RizzoTheRat said:
If you really want to mess with your head,
Try explaining yo yourself - and me - the meaning of the Equation of Time!

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

It's the reason the latest sunrise, the shortest day and the earliest sunset aren't all on the same day. It is also something to do with the fact that the Earth's orbit isn't a perfect circle - I think.
You pretty much have it.

The earth orbits the sun in an ellipse. If it were a perfect circle then each solar day would be at the same time every day. But it isn't so there's a difference between an average solar day and the ones we experience.

The graph above can be used to create an equasion of time function on watches which helpfully tell you how far behind or ahead apparent solar time is of average solar time, which is vital information for bragging down the pub. It's the top right subdial here:



Edited by glazbagun on Friday 6th December 16:16

Ayahuasca

27,427 posts

279 months

Friday 6th December 2019
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Master Bean said:
I've infused some gin with clementines and added sugar. Will the alcohol percentage go up, down, or stay the same? It tastes good btw.
It is possible that yeast within the clementines will ferment and turn the sugar to alcohol and carbon dioxide. So, if it starts to taste fizzy it might be getting stronger. If it doesn’t, it isn’t. But it will get you pissed faster as you will drink more of it because sweet.

Frank7

6,619 posts

87 months

Friday 6th December 2019
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deadtom said:
Frank7 said:
While not doubting you for one second, are you sure
that the customer didn’t spell his name as Vivian?
Alfred, Lord Tennyson’s “Lady of the Lake” was Vivien.
Doubt away, as I am not sure in the least.

It probably was Vivian, if that is the way the male version is usually spelled.

Thank you for bringing the error to my attention, I shall edit my initial statement.
Don’t edit it yet Tom,
a) I said that I didn’t doubt you,
and b)
the enne In Vivienne suggested
to me that it was feminine, but
what do I know?

Halmyre

11,193 posts

139 months

Friday 6th December 2019
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TommyBuoy said:
popeyewhite said:
Halmyre said:
craig_m67 said:
RosscoPCole said:
I know that there will be a simple answer to this. My parents flew from New Zealand to America. The pilot came over the tannoy and said we have just crossed the international date line today will be Tuesday again! So they had the same day twice?! Like the day gained in Round the World in 80 Days. So technically they have lived a day longer than me but aren't because of the days away. Messes my head.
Or

They’ve lived a day less than you, having missed (your) Wednesday and having to redo Tuesday for their sins. If they came home the same way (as opposed to going right around) they would recross the date line and jump ahead a day, never get Wednesday back.

I once flew out of Sydney on New Year’s Eve, was awoken a bit later by the crew to celebrate with champers etc., landed in LA the day before and ended up having New Years Eve again.

Time’s a construct

Wait until people start travelling to Mars on the Musky express and then really come back younger than you
Older. You age faster out of earth's gravitational field (general relativity). You age more slowly when you're moving (special relativity), but general wins out over special (unless you're moving at a significant percentage of c).

https://en.wikipedia.org/wiki/Gravitational_time_d...
Einstein suggested the inter-planteary traveller would age less than their twin that remained on Earth https://en.wikipedia.org/wiki/Twin_paradox
Gravitational time delation Vs general relativity time dilation.

Anyone able to work out the intersection of time dilation off these two theories? Gravitational force as well as speed variables make it a bit beyond me today!
Using the equations 1 and 3 from here:

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

I calculate that r*v^2 = 2 * G * M, or 7.96*10^14 m^3/s^2

In practical terms, for a GPS satellite, general relativity wins out over special. A GPS satellite would need to travel at 12,000,000 mph before they would equal out - they normally travel at 8,700 mph. Someone might want to check the maths!

This makes all sort of assumptions and caveats of course, not least of which is getting a GPS satellite to stay in orbit at that speed.

LimaDelta

6,520 posts

218 months

Friday 6th December 2019
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gazzarose said:
TommoAE86 said:
How do targeted ad's work? I'm finding that my youtube/facebook suggestions are coming up with stuff related to conversation topics I've had, but more so than anytime previously.

I've turned off my microphone on the phone for everything and the same for my wife. The people I talk to are not on my facebook so has something changed in this area to get through that?

Maybe I need to invest in some more tin foil laugh

Edited by TommoAE86 on Friday 6th December 15:11
"They" do seem to be listening. I can't remeber what it was, but I was talking about something the other day and suddenly had ads for it. I've also been talking about something, and when I went to Google it, it came up as the first suggestion when I started typing. I used to take the pi$$ of my wife putting a plaster over the camera on her tablet saying she was paranoid, but I think more and more we are being observed, maybe not visually, yet, but certainly conversations seem to be triggering ads.
They aren't listening, the truth is far scarier. There are algorithms which are accurate enough to predict our behaviour based on what we like, who we speak to, what they like etc. Ask yourself what prompted you to have that particular conversation in the first place? Was it a movie you both watched recently? A news story or a photo on your timeline? Like it or not, most of us are very predictable in our actions. That's why it seems sometimes like our devices are listening to us. Cover your microphone and see if it still happens. I'll bet it will.

StevieBee

12,888 posts

255 months

Friday 6th December 2019
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LimaDelta said:
They aren't listening.
You 100% on that? I'm not disputing you but strange things do seem to be happening.

I work in an office of blokes and got chatting the other week about alternatives to Turkey. Completely random discussion without any previous basis that sparked the conversation. Someone mentioned Goose. Another, venison. Within an hour, three of us had ads shrining up on our social media for Waitrose "Game" Christmas, Tesco "Goose" and such.

Now bear in mind that our business is advertising and marketing, we know the whole NLP thing but this got us spooked as there wasn't a single thing any of us had liked, shared, looked at of in any other way interacted with that would give even the merest suggestion of our interest in game meat.

droopsnoot

11,933 posts

242 months

Friday 6th December 2019
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Not saying that no listening is done, but I get some spookily targeted adverts, even though my phone (which is not Android or iOS, or switched on) is in the car and this computer doesn't have either a microphone or a camera.

LimaDelta

6,520 posts

218 months

Friday 6th December 2019
quotequote all
StevieBee said:
LimaDelta said:
They aren't listening.
You 100% on that? I'm not disputing you but strange things do seem to be happening.

I work in an office of blokes and got chatting the other week about alternatives to Turkey. Completely random discussion without any previous basis that sparked the conversation. Someone mentioned Goose. Another, venison. Within an hour, three of us had ads shrining up on our social media for Waitrose "Game" Christmas, Tesco "Goose" and such.

Now bear in mind that our business is advertising and marketing, we know the whole NLP thing but this got us spooked as there wasn't a single thing any of us had liked, shared, looked at of in any other way interacted with that would give even the merest suggestion of our interest in game meat.
I'm not saying it isn't possible to eavesdrop on individuals, we all know that our phones can be easily hacked by intelligence agencies or non-state actors, but I'm 99.9% certain that targeted marketing does not 'listen' to people's conversations. Do you really think that an advert for game or geese at Christmas is unusual?

Let's say you are in a relationship, and your peers or similar age and social standing who also are in relationships take on average 9 months before announcing an engagement. You have been with your partner for slightly less than 9 months and FB all of a sudden is popping up occasional adverts for jewelers or fancy hotels. You might not notice it at first, but subliminally it has got you thinking, so you and your partner discuss marriage, then the next time you log on boom! there are adverts everywhere for wedding venues and florists. We give out a crazy amount of personal data these days, it's not that hard for companies like FB to see patterns there and profit from them.

StevieBee

12,888 posts

255 months

Friday 6th December 2019
quotequote all
LimaDelta said:
StevieBee said:
LimaDelta said:
They aren't listening.
You 100% on that? I'm not disputing you but strange things do seem to be happening.

I work in an office of blokes and got chatting the other week about alternatives to Turkey. Completely random discussion without any previous basis that sparked the conversation. Someone mentioned Goose. Another, venison. Within an hour, three of us had ads shrining up on our social media for Waitrose "Game" Christmas, Tesco "Goose" and such.

Now bear in mind that our business is advertising and marketing, we know the whole NLP thing but this got us spooked as there wasn't a single thing any of us had liked, shared, looked at of in any other way interacted with that would give even the merest suggestion of our interest in game meat.
I'm not saying it isn't possible to eavesdrop on individuals, we all know that our phones can be easily hacked by intelligence agencies or non-state actors, but I'm 99.9% certain that targeted marketing does not 'listen' to people's conversations. Do you really think that an advert for game or geese at Christmas is unusual?

Let's say you are in a relationship, and your peers or similar age and social standing who also are in relationships take on average 9 months before announcing an engagement. You have been with your partner for slightly less than 9 months and FB all of a sudden is popping up occasional adverts for jewelers or fancy hotels. You might not notice it at first, but subliminally it has got you thinking, so you and your partner discuss marriage, then the next time you log on boom! there are adverts everywhere for wedding venues and florists. We give out a crazy amount of personal data these days, it's not that hard for companies like FB to see patterns there and profit from them.
Yeah.... I know you're right!

Bloody clever either way.

It's really just a much more refined and more accurate approach to that taken by agencies for decades. Pre-internet, you'd select a newspaper or magazine that the majority of your target audience would be most likely to read.

Speed 3

4,564 posts

119 months

Friday 6th December 2019
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I'm sure its some form of eavesdropping and over the last few months it seems to have intensified. We had a random conversation about our bifold doors fitted 3 years ago (made by Origin) and within an hour an ad for Origin had popped into Mrs S3's FB feed. Numerous other examples of the same "randomness". I'm not generally anything like a tin hatter btw.

Ayahuasca

27,427 posts

279 months

Friday 6th December 2019
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Relative of mine works for a US firm that uses mobile tech to micro target ads. Like they know when you are say near a Krispy Kreme store and they will send you a Krispy Creme ad.

They were not allowed to do the same in the EU because GDPR.

V8mate

45,899 posts

189 months

Friday 6th December 2019
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Ayahuasca said:
Relative of mine works for a US firm that uses mobile tech to micro target ads. Like they know when you are say near a Krispy Kreme store and they will send you a Krispy Creme ad.

They were not allowed to do the same in the EU because GDPR.
Don't think so. Pull up for more than ten seconds with Waze running and it'll start suggesting nearby Maccy D's, Tesco, Lidl etc nearby and asking if you'd like to change your route to visit them.

Ayahuasca

27,427 posts

279 months

Friday 6th December 2019
quotequote all
V8mate said:
Ayahuasca said:
Relative of mine works for a US firm that uses mobile tech to micro target ads. Like they know when you are say near a Krispy Kreme store and they will send you a Krispy Creme ad.

They were not allowed to do the same in the EU because GDPR.
Don't think so. Pull up for more than ten seconds with Waze running and it'll start suggesting nearby Maccy D's, Tesco, Lidl etc nearby and asking if you'd like to change your route to visit them.
Maybe it’s in the Waze small print. The US one does not need any app to be running, it knows where you are anyway.

simoid

19,772 posts

158 months

Friday 6th December 2019
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Watching one of the “real life drugs trade” documentaries on Netflix presently.

What drug dealer/cook/trafficker in their right mind agrees to go on TV? Is it for the bragging/thrill?

captain_cynic

11,998 posts

95 months

Saturday 7th December 2019
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simoid said:
Watching one of the “real life drugs trade” documentaries on Netflix presently.

What drug dealer/cook/trafficker in their right mind agrees to go on TV? Is it for the bragging/thrill?
Never underestimate the power of narcissism.

Also, likely to be bumped off by his boss or competition. Law enforcement get a lot of their type to crack when they know that being released will get them maimed or killed. Being a minor celebrity is seen as a way out, maybe do a little jail time (earning street cred) and hope whoever wanted you dead has larger concerns now.

HTP99

22,549 posts

140 months

Saturday 7th December 2019
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Just peeling a couple of hard boiled eggs and failing miserably again to peel them well and taking an age to do it; when you buy a scotch egg or see those egg and spinach pots, the eggs are peeled perfectly, how is this done?!

Fastchas

2,646 posts

121 months

Sunday 8th December 2019
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I’ve heard of the Victorian era, Edwardian, Tudor etc and also the Elizabethan age.
What era are we currently living in? Elizabethan? Regina? Windsor?

Welshbeef

49,633 posts

198 months

Sunday 8th December 2019
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Regarding supercharged engines.


From my understanding of supercharged engines you need power to drive the supercharged as such the engine uses more fuel than otherwise as a N/A.

However the question is let’s say you have a 2ltr engine supercharged and let’s say it makes 400bhp would the N/A engine required to produce 400bhp be less fuel efficient?
As in the benefit of Supercharged engine is packaging and low down torque vs a bigger cc engine N/A.

Dr Jekyll

23,820 posts

261 months

Sunday 8th December 2019
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Welshbeef said:
Regarding supercharged engines.


From my understanding of supercharged engines you need power to drive the supercharged as such the engine uses more fuel than otherwise as a N/A.

However the question is let’s say you have a 2ltr engine supercharged and let’s say it makes 400bhp would the N/A engine required to produce 400bhp be less fuel efficient?
As in the benefit of Supercharged engine is packaging and low down torque vs a bigger cc engine N/A.
Fascinating question.
Are you asking about fuel efficiency when actually pushing out 400bhp or overall including spending most of the time at smaller throttle openings?

Clockwork Cupcake

74,548 posts

272 months

Sunday 8th December 2019
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Welshbeef said:
Regarding supercharged engines.


From my understanding of supercharged engines you need power to drive the supercharger as such the engine uses more fuel than otherwise as a N/A.

However the question is let’s say you have a 2ltr engine supercharged and let’s say it makes 400bhp would the N/A engine required to produce 400bhp be less fuel efficient?
As in the benefit of Supercharged engine is packaging and low down torque vs a bigger cc engine N/A.
I'm not an engine designer, but a larger capacity Naturally Aspirated engine is probably going to have more frictional losses for a start, so that's going to be contributory.

But, yes, a belt-driven supercharger is going to have a parasitic loss, which is why they fell out of favour compared to turbo charging, since with that the compressor is powered by exhaust gasses.

(It's worth noting that a turbo charger is actually, to be more precise, an exhaust-driven supercharger).

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