Glass Half Full, but 90% WOULD BE BETTER

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Mr Milk
Mr Milk
NSW
3140 posts
NSW, 3140 posts
14 Mar 2013 11:04pm
I just, for the sheer hell of it, weighed the contents of a can of Woolies home brand Kidney Beans, while I was fixing up a mess of chilli for dinner.
The can says 400g, but the beans totalled about 240g after draining. That would have been even less if I had surface dried them.
So you Woolies shareholders owe me! Thieves!
That said, are there any other common products, outside the supermarket space, that you know of where blatant short supply is normal?
Buster fin
Buster fin
WA
2599 posts
WA, 2599 posts
14 Mar 2013 8:16pm
I'd really like to measure the petrol being pumped at my local Woolies fuel outlet...
adolf
adolf
1862 posts
1862 posts
14 Mar 2013 8:19pm
You guys ought to watch Today Tonight on Channel 7 they do stories about that sort of stuff a fair bit. The other week they did this story about some chick who dyed her own hair and she went bald - fricken interesting.
Pitbull
Pitbull
WA
1267 posts
WA, 1267 posts
14 Mar 2013 9:29pm
The label on the back tells you the % of water, If it's the second ingredient after the main one, then beware.
saltiest1
saltiest1
NSW
2575 posts
NSW, 2575 posts
15 Mar 2013 12:33am
adolf said...
You guys ought to watch Today Tonight on Channel 7 they do stories about that sort of stuff a fair bit. The other week they did this story about some chick who dyed her own hair and she went bald - fricken interesting.



yeah they were really good with that facebeef mess also credibility of zip.
Sailhack
Sailhack
VIC
5000 posts
VIC, 5000 posts
15 Mar 2013 9:38am
small bags of potato chips - bags look nice and full, but upon opening them - merely a chi inside - same for pringles!

(btw, I don't actually eat chips - just repeating what I have to hear when the wife's on a rampage about it.)
dorothyinste
dorothyinste
QLD
481 posts
QLD, 481 posts
15 Mar 2013 9:59am
Buster fin said...
I'd really like to measure the petrol being pumped at my local Woolies fuel outlet...


I was suspicious of our local servo's pumps and decided to do my own measurements. Apparently, volume of petrol fuel can change with temperature and or atmospheric conditions. So measuring by volume is not consistent, but measuring by weight is. One litre of fuel should always be consistent in weight(about 732grams).
Used a commercial battery operated scale and the weight was spot on.
Fuel retailers are inspected regularly and their pumps are tagged.
Bogosaurus
Bogosaurus
SA
7 posts
SA, 7 posts
15 Mar 2013 1:53pm
Sailhack said...
small bags of potato chips - bags look nice and full, but upon opening them - merely a chi inside - same for pringles!


You would have an entire bag of crumbs without that extra 'wasted' airspace. There would be loads more complaints about that.
mattyjee
mattyjee
WA
575 posts
WA, 575 posts
15 Mar 2013 1:11pm
dorothyinste said...
Buster fin said...
I'd really like to measure the petrol being pumped at my local Woolies fuel outlet...


I was suspicious of our local servo's pumps and decided to do my own measurements. Apparently, volume of petrol fuel can change with temperature and or atmospheric conditions. So measuring by volume is not consistent, but measuring by weight is. One litre of fuel should always be consistent in weight(about 732grams).
Used a commercial battery operated scale and the weight was spot on.
Fuel retailers are inspected regularly and their pumps are tagged.


You've actually got that backwards - one litre of fuel is always one litre of fuel. So if you fill 5 litres of fuel into a measuring jug at the servo you should get exactly 5 litres of fuel. (Different story if you then allow that one litre to warm up or cool down between the two measurements).

Meanwhile, the weight of a litre of fuel is dependant on the temperature you've measured it out at.
Secondly, petrol is made at a refinery by blending several different components - the weight of a litre of fuel will vary considerably from batch to batch.
dorothyinste
dorothyinste
QLD
481 posts
QLD, 481 posts
15 Mar 2013 6:06pm
mattyjee said...


You've actually got that backwards - one litre of fuel is always one litre of fuel. So if you fill 5 litres of fuel into a measuring jug at the servo you should get exactly 5 litres of fuel. (Different story if you then allow that one litre to warm up or cool down between the two measurements).

Meanwhile, the weight of a litre of fuel is dependant on the temperature you've measured it out at.
Secondly, petrol is made at a refinery by blending several different components - the weight of a litre of fuel will vary considerably from batch to batch.


Hmm, ok thanks for that.
So a kilo of petrol at 30 degrees will weigh differently at say 5 degrees ?
Any chance you could explain how that works?
Shane10
Shane10
QLD
102 posts
QLD, 102 posts
15 Mar 2013 7:13pm
mattyjee said...

You've actually got that backwards - one litre of fuel is always one litre of fuel. So if you fill 5 litres of fuel into a measuring jug at the servo you should get exactly 5 litres of fuel. (Different story if you then allow that one litre to warm up or cool down between the two measurements).

Meanwhile, the weight of a litre of fuel is dependant on the temperature you've measured it out at.
Secondly, petrol is made at a refinery by blending several different components - the weight of a litre of fuel will vary considerably from batch to batch.


Would love some elaboration on this. I'm under the impression that the volume will vary with temp (as in any liquid I can think of) but the mass will remain constant (ignoring evaporation)???

slammin
slammin
QLD
998 posts
QLD, 998 posts
15 Mar 2013 8:01pm
Mr Milk said...

I just, for the sheer hell of it, weighed the contents of a can of Woolies home brand Kidney Beans, while I was fixing up a mess of chilli for dinner.
The can says 400g, but the beans totalled about 240g after draining. That would have been even less if I had surface dried them.
So you Woolies shareholders owe me! Thieves!
That said, are there any other common products, outside the supermarket space, that you know of where blatant short supply is normal?


SO you spent the absolute bare minimum on a can of beans and you're surprised when it's not crammed full of beans?

I don't see how you could claim that as a blatant short supply. Now if you bought meat that was injected or tumbled, in the name of making it seasoned or tender then you would have made a better point. In essence what happens is the meat is "value added" and now heavier, rinse and repeat for tonnes of meat and you're looking at a healthy profit.

www.hotell-berlin.net/no/foodproductdesign.html
patsken
patsken
WA
717 posts
WA, 717 posts
15 Mar 2013 6:54pm
mattyjee said...
dorothyinste said...
Buster fin said...
I'd really like to measure the petrol being pumped at my local Woolies fuel outlet...


I was suspicious of our local servo's pumps and decided to do my own measurements. Apparently, volume of petrol fuel can change with temperature and or atmospheric conditions. So measuring by volume is not consistent, but measuring by weight is. One litre of fuel should always be consistent in weight(about 732grams).
Used a commercial battery operated scale and the weight was spot on.
Fuel retailers are inspected regularly and their pumps are tagged.


You've actually got that backwards - one litre of fuel is always one litre of fuel. So if you fill 5 litres of fuel into a measuring jug at the servo you should get exactly 5 litres of fuel. (Different story if you then allow that one litre to warm up or cool down between the two measurements).

Meanwhile, the weight of a litre of fuel is dependant on the temperature you've measured it out at.
Secondly, petrol is made at a refinery by blending several different components - the weight of a litre of fuel will vary considerably from batch to batch.




It's definitely lighter from when I was a kid !!!

There's no more lead in it and we all know how heavy lead can be....
Carantoc
Carantoc
WA
7298 posts
WA, 7298 posts
15 Mar 2013 6:55pm
Mr Milk said...

........

That said, are there any other common products, outside the supermarket space, that you know of where blatant short supply is normal?




mattyjee said...

....... one litre of fuel is always one litre of fuel. So if you fill 5 litres of fuel into a measuring jug at the servo you should get exactly 5 litres of fuel. (Different story if you then allow that one litre to warm up or cool down between the two measurements).

Meanwhile, the weight of a litre of fuel is dependant on the temperature you've measured it out at.



Yes .... at Seabreeze forums the understanding of the laws of the universe are in blatant short supply, and everyone seems to regard it as normal.



mattyjee
mattyjee
WA
575 posts
WA, 575 posts
15 Mar 2013 10:25pm
dorothyinste said...
Hmm, ok thanks for that.
So a kilo of petrol at 30 degrees will weigh differently at say 5 degrees ?
Any chance you could explain how that works?


No a kilo of petrol will always weigh a kilo - no matter what.
A litre of petrol will weigh a different amount based on the temperature. - Now this is not saying that you get a litre, change the temperature and it will weigh different no - it will weigh the same becuse there is the same mass of petrol in the container. But if you measure out a litre of petrol at 5 degrees and measure out a litre at 30 degrees yes they will weigh different. But they will both still be a litre!

Rudebeef said...
Would love some elaboration on this. I'm under the impression that the volume will vary with temp (as in any liquid I can think of) but the mass will remain constant (ignoring evaporation)???


Yes you are correct - thats what I said.

bundeep
bundeep
14 posts
14 posts
16 Mar 2013 1:12am
There was an argument that it was better to fill up your tank at night, early morning (coldest part of the day) because the fuel would be most dense at this time of day and because petrol bowsers measure fuel by volume, not weight.

But none of this is anything to worry about when when you consider the coefficient of thermal expansion of petrol is something like 0.001 per degree Celcius.. Any increase in density will be lost in the rounding..
dorothyinste
dorothyinste
QLD
481 posts
QLD, 481 posts
16 Mar 2013 7:01am
mattyjee said...


No a kilo of petrol will always weigh a kilo - no matter what.
A litre of petrol will weigh a different amount based on the temperature. - Now this is not saying that you get a litre, change the temperature and it will weigh different no - it will weigh the same becuse there is the same mass of petrol in the container. But if you measure out a litre of petrol at 5 degrees and measure out a litre at 30 degrees yes they will weigh different. But they will both still be a litre!






Just to clarify: mass and weight are both measured in grams and kilos. Mass can change with temperature and weight remains constant. So therefore: measuring mass or volume is temperature dependent, but measuring weight is consistent regardless of temperature.
I still do not understand how, as you state "You've actually got that backwards "
Cambodge
Cambodge
VIC
851 posts
VIC, 851 posts
16 Mar 2013 12:59pm
dorothyinste said...
mattyjee said...


No a kilo of petrol will always weigh a kilo - no matter what.
A litre of petrol will weigh a different amount based on the temperature. - Now this is not saying that you get a litre, change the temperature and it will weigh different no - it will weigh the same becuse there is the same mass of petrol in the container. But if you measure out a litre of petrol at 5 degrees and measure out a litre at 30 degrees yes they will weigh different. But they will both still be a litre!






Just to clarify: mass and weight are both measured in grams and kilos. Mass can change with temperature and weight remains constant. So therefore: measuring mass or volume is temperature dependent, but measuring weight is consistent regardless of temperature.
I still do not understand how, as you state "You've actually got that backwards "


Clearly high school physics textbooks are in short supply in this country!
rockmagnet
rockmagnet
QLD
1458 posts
QLD, 1458 posts
16 Mar 2013 3:07pm
And this brings us to the Higgs boson which I'm sure all seabreezers would know,gives mass to objects .Now here's a thing now that they have found it, how long before they learn to remove the mass from an object which if you could do to a space ship or volkswagen would allow you to travel at the speed of light across the universe on a litre of fuel regardless of the mass. It would still be a litre of fuel.
Or would it ? (Plays x file music in background]
Rupert
Rupert
TAS
2967 posts
TAS, 2967 posts
16 Mar 2013 11:50pm
It doesn't matter if the "Glass is half full or Half empty".

It's twice as big as it needs to be....................
FlySurfer
FlySurfer
NSW
4460 posts
NSW, 4460 posts
17 Mar 2013 1:36pm
My local Caltex sells E10 as Vortex... c**ts.
I know this cos my car pings with E10.

I'm sure it was a one off mistake.
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