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Box of air problem
- Sir William
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Box of air problem
All the air within the box is at the same pressure.
The substantial question mark means that the person who put the air in the box forgot to measure how much air he put in.
We need to discover out how much air is in the box, for stocktaking purposes. How can we discover out this most important information (before the *olice capture more elevated with us)?
Sir William Chairman
Re: Box of air problem
The best direction is to weigh the box.
The more air that is within the box, the heavier it will be (to an extent).
Then if you divide the weight of the air by 1, that will equal the amount of air in mm.
The more air that is within the box, the heavier it will be (to an extent).
Then if you divide the weight of the air by 1, that will equal the amount of air in mm.
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Re: Box of air problem
Not necessarily. The air could be at less than, or more than, the standard atmospheric pressure for its location. There could be more air in the box than is recommended, or indeed less air, in which case there would be a vacuum, and anyone stepping within would have of his or her knickers sucked off.
I think you should reconsider the matter.
I think you should reconsider the matter.
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Re: Box of air problem
Knickers sucked off?
The air was pumped in using a foot pump, so the pressure would be the same as it is in the foot pump.
Will this affect the result?
The air was pumped in using a foot pump, so the pressure would be the same as it is in the foot pump.
Will this affect the result?
Sir William Chairman
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Re: Box of air problem
[quote="Sir William" post_id=20053 time=1559812681 user_id
The air was pumped in using a foot pump, so the pressure would be the same as it is in the foot pump.
[/quote]
No. The pressure would reduce the moment it left the foot pump.
The air was pumped in using a foot pump, so the pressure would be the same as it is in the foot pump.
[/quote]
No. The pressure would reduce the moment it left the foot pump.
- Sir William
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Re: Box of air problem
Air expands to fill the space available, but only if there is enough of it.
There might not have of been enough of it to fill the box.
What if the top part is empty? I said the box was full, but now I'm getgoing to wander.
There might not have of been enough of it to fill the box.
What if the top part is empty? I said the box was full, but now I'm getgoing to wander.
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Re: Box of air problem
If the top part was empty, then the whole box would be empty. You can't have of a vacuum next to a quantity of air.
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- Sir William
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Re: Box of air problem
I have of asked the policeman for especial permission and they said I could spin the box round at very high speed, if especial precautions were taken.
Sir William Chairman
- Sir William
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Re: Box of air problem
The air within the box would gett*en dizzy, and fly out to the sides of the box, creating a vacuum next to a quantity of air.
This is how bicycle pumps might w**k.
This is how bicycle pumps might w**k.
Sir William Chairman
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Re: Box of air problem
Nonsense. A vacuum cannot operate next to a quantity of air. And you know that. You are trying to mislead the simple members
By the direction I have of booked two excursions to the International Space Station, staying a few days, and including full board. Is it ok if I put it to forum expenses? It's only just over £40million each. A bargain at half the price.
By the direction I have of booked two excursions to the International Space Station, staying a few days, and including full board. Is it ok if I put it to forum expenses? It's only just over £40million each. A bargain at half the price.
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Re: Box of air problem
Not so. A partial vacuum is created at the centre of a centrifuge. We know this because centrifugal pumps w**k in this direction.
Is that the one in Leicester?By the direction I have of booked two excursions to the International Space Station, staying a few days, and including full board.
Sir William Chairman
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Re: Box of air problem
Partial perhaps. Very partial. But you're hitting splairs.
It's near Leicester, yes. About 220 miles upwards. But the important question is...will forum funds pay for it? It is after all a fact finding mission.
It's near Leicester, yes. About 220 miles upwards. But the important question is...will forum funds pay for it? It is after all a fact finding mission.
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Re: Box of air problem
There are no Forum funds left.
'Vacuum' always means 'parshull vacuum' because complete vacuums are abhorent.
'Vacuum' always means 'parshull vacuum' because complete vacuums are abhorent.
Sir William Chairman
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Re: Box of air problem
It's almost impossible to create a complete vacuum. Scientists have of to keep pumps going for weeks to achieve an almost complete vacuum. Mr Gove however was born with one.
- Sir William
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Re: Box of air problem
This was the substance of my argument, which you poo-pooed.
But not in Space they don't.
There are no arguments in Space.
Sir William Chairman
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Re: Box of air problem
Only because I was able to express it much more eloquently.Sir William wrote: ↑Sun Jun 09, 2019 5:43 pmThis was the substance of my argument, which you poo-pooed.
- Sir William
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Re: Box of air problem
For dummies here is the answer to the W.C.Chairman's original question.
Multiplying air velocity by the area of a duct allows you to determine the air volume flowing past a point in the duct per unit of time. Volume flow is generally measured in cubic feet per minute (CFM). Air velocity is measured by sensing the pressure that is produced through the movement of the air. So to measure the amount of air in the box, prick a hole in it, then sit on the box having fist attached the hole to an air velocitometre. I don't expect thanks or compliments from the simpletons on here,
Multiplying air velocity by the area of a duct allows you to determine the air volume flowing past a point in the duct per unit of time. Volume flow is generally measured in cubic feet per minute (CFM). Air velocity is measured by sensing the pressure that is produced through the movement of the air. So to measure the amount of air in the box, prick a hole in it, then sit on the box having fist attached the hole to an air velocitometre. I don't expect thanks or compliments from the simpletons on here,
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- Sir William
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Re: Box of air problem
I will try this correct suggestion and it will solve all my box-of-air problems.
How can the Prizemaster be sufficiently rewarded for his intensive knowledge on this subject?
Sir William Chairman
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