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Felpersham University Physics Department just rang. They need someone to >develop a theory of Quantum Gravity and wonder if Joy can do it since
she seems able to do everything else.
On Tue, 24 Jun 2025 14:08:46 +0100, john ashby <johnashby20@yahoo.com>
wrote:
Felpersham University Physics Department just rang. They need someone toI think they've already offered her a position at Mar al Largo
develop a theory of Quantum Gravity and wonder if Joy can do it since
she seems able to do everything else.
On 24/06/2025 18:13, Nick Odell wrote:
On Tue, 24 Jun 2025 14:08:46 +0100, john ashby <johnashby20@yahoo.com>
wrote:
Felpersham University Physics Department just rang. They need someone to >>> develop a theory of Quantum Gravity and wonder if Joy can do it sinceI think they've already offered her a position at Mar al Largo
she seems able to do everything else.
Does it involve crouching on a glass table ?
In fact she's been kidnapped by her daughter on behalf of Palestine
Action, shipped to Tehran, and is centrifuging Uranium by whirling her tights round her head.
On Tue, 24 Jun 2025 14:08:46 +0100, john ashby <johnashby20@yahoo.com>
wrote:
Felpersham University Physics Department just rang. They need someone toI think they've already offered her a position at Mar al Largo
develop a theory of Quantum Gravity and wonder if Joy can do it since
she seems able to do everything else.
On 2025/6/24 18:25:47, BrritSki wrote:
On 24/06/2025 18:13, Nick Odell wrote:
On Tue, 24 Jun 2025 14:08:46 +0100, john ashby <johnashby20@yahoo.com>
wrote:
Felpersham University Physics Department just rang. They needI think they've already offered her a position at Mar al Largo
someone to
develop a theory of Quantum Gravity and wonder if Joy can do it since
she seems able to do everything else.
Does it involve crouching on a glass table ?
In fact she's been kidnapped by her daughter on behalf of Palestine
Action, shipped to Tehran, and is centrifuging Uranium by whirling her
tights round her head.
OT: if anyone's wondering. they usually centrifuge uranium (the purpose
of which is to separate the lighter isotope) by centrifuging a compound
- uranium fluoride (UF6 maybe? Not sure of the relative valencies),
It's the U235 they want; U238 (or, really, natural uranium as mined;
that contains only a _small proportion_ of the 235) is just a boring
metal, somewhat like lead.
On 24/06/2025 20:24, J. P. Gilliver wrote:
On 2025/6/24 18:25:47, BrritSki wrote:
On 24/06/2025 18:13, Nick Odell wrote:
On Tue, 24 Jun 2025 14:08:46 +0100, john ashby <johnashby20@yahoo.com> >>>> wrote:
Felpersham University Physics Department just rang. They needI think they've already offered her a position at Mar al Largo
someone to
develop a theory of Quantum Gravity and wonder if Joy can do it since >>>>> she seems able to do everything else.
Does it involve crouching on a glass table ?
In fact she's been kidnapped by her daughter on behalf of Palestine
Action, shipped to Tehran, and is centrifuging Uranium by whirling
her tights round her head.
OT: if anyone's wondering. they usually centrifuge uranium (the
purpose of which is to separate the lighter isotope) by centrifuging a
compound - uranium fluoride (UF6 maybe? Not sure of the relative
valencies),
Yes, uranium hexafluoride to be pedantic (DINTAFPOU?)
It's the U235 they want; U238 (or, really, natural uranium as mined;
that contains only a _small proportion_ of the 235) is just a boring
metal, somewhat like lead.
Both U235 and U238 are radioactive with halflives of 700 million and 4.5 billion years respectively.
U235 is fissile (meaning it can be made into
reactor elements to sustain a controlled chain reaction or a bomb for an uncontrolled one, while U238 is fertile meaning it can absorb a neutron
to become plutonium, Pu239, which is itself fissile. Or course do do
this there has to be a source of neutrons. Depleted uranium has a higher concentration of U238 than natural uranium (it might be better to say
that delpetede uranium has a lower concentration of U235) and its readioactivity is of a sufficiently low level that it can be moderately safely used in boat keels, ammunition or (as I have known) paperweights. it's main toxicity is chemical, like many heavy metals.
john
On 24/06/2025 22:21, john ashby wrote:
On 24/06/2025 20:24, J. P. Gilliver wrote:
On 2025/6/24 18:25:47, BrritSki wrote:
On 24/06/2025 18:13, Nick Odell wrote:
On Tue, 24 Jun 2025 14:08:46 +0100, john ashby <johnashby20@yahoo.com> >>>>> wrote:
Felpersham University Physics Department just rang. They needI think they've already offered her a position at Mar al Largo
someone to
develop a theory of Quantum Gravity and wonder if Joy can do it since >>>>>> she seems able to do everything else.
Does it involve crouching on a glass table ?
In fact she's been kidnapped by her daughter on behalf of Palestine
Action, shipped to Tehran, and is centrifuging Uranium by whirling
her tights round her head.
OT: if anyone's wondering. they usually centrifuge uranium (the
purpose of which is to separate the lighter isotope) by centrifuging
a compound - uranium fluoride (UF6 maybe? Not sure of the relative
valencies),
Yes, uranium hexafluoride to be pedantic (DINTAFPOU?)
It's the U235 they want; U238 (or, really, natural uranium as mined;
that contains only a _small proportion_ of the 235) is just a boring
metal, somewhat like lead.
Both U235 and U238 are radioactive with halflives of 700 million and
4.5 billion years respectively.
That's an extremely long time, and a remarkably round number. How on
earth did they work it out?
On 25/06/2025 18:05, Joe Kerr wrote:
On 24/06/2025 22:21, john ashby wrote:
On 24/06/2025 20:24, J. P. Gilliver wrote:
On 2025/6/24 18:25:47, BrritSki wrote:
On 24/06/2025 18:13, Nick Odell wrote:
On Tue, 24 Jun 2025 14:08:46 +0100, john ashby
<johnashby20@yahoo.com>
wrote:
Felpersham University Physics Department just rang. They needI think they've already offered her a position at Mar al Largo
someone to
develop a theory of Quantum Gravity and wonder if Joy can do it >>>>>>> since
she seems able to do everything else.
Does it involve crouching on a glass table ?
In fact she's been kidnapped by her daughter on behalf of Palestine >>>>> Action, shipped to Tehran, and is centrifuging Uranium by whirling
her tights round her head.
OT: if anyone's wondering. they usually centrifuge uranium (the
purpose of which is to separate the lighter isotope) by centrifuging
a compound - uranium fluoride (UF6 maybe? Not sure of the relative
valencies),
Yes, uranium hexafluoride to be pedantic (DINTAFPOU?)
It's the U235 they want; U238 (or, really, natural uranium as mined;
that contains only a _small proportion_ of the 235) is just a boring
metal, somewhat like lead.
Both U235 and U238 are radioactive with halflives of 700 million and
4.5 billion years respectively.
That's an extremely long time, and a remarkably round number. How on
earth did they work it out?
The usual way. If you know how many atoms are in a sample and how many
decay in a given time interval you can calculate (estimate) the
probability of any one atome decaying. It's then a simple statistical calculation to get to the half life. I have rounded the numbers,
wikipaedia gives them to 3 significant figures.
john
Depleted uranium has a higher
concentration of U238 than natural uranium (it might be better to say
that delpetede uranium has a lower concentration of U235) and its readioactivity is of a sufficiently low level that it can be moderately safely used in boat keels, ammunition or (as I have known) paperweights.
it's main toxicity is chemical, like many heavy metals.