Neutrons and Coffee

[jamesr]

Here’s a great example of how neutrons interact with things…
http://www.guardian.co.uk/science/life-and-physics/2010/oct/17/1

They put an aluminium espresso maker in a neutron beam – the coffee pot is virtually transparent to the neutrons, whereas the water is almost black due to the hydrogen scattering the neutrons out of the beam.

[Brian H]

jamesr wrote: Here’s a great example of how neutrons interact with things…
http://www.guardian.co.uk/science/life-and-physics/2010/oct/17/1

They put an aluminium espresso maker in a neutron beam – the coffee pot is virtually transparent to the neutrons, whereas the water is almost black due to the hydrogen scattering the neutrons out of the beam.

Very espressive!

Perhaps you could inform me about something I’m disputing about on another site. When the steam condenses, does it thereby heat up its container/shared atmosphere (if any) in direct transfer of latent heat energy? Email me at brianfh01-at-yahoo.ca if you don’t want to deflect this thread.

[jamesr]

Brian H wrote:
Perhaps you could inform me about something I’m disputing about on another site. When the steam condenses, does it thereby heat up its container/shared atmosphere (if any) in direct transfer of latent heat energy?

Steam condensing is just like sweat evaporating in reverse. So whereas evaporation extracts heat from its surroundings (like your skin) to overcome the latent of vaporisation. Condensation will return exactly the same amount. So water vapour condensing on a cold window or bathroom mirror will warm it up slightly.

[Brian H]

jamesr wrote:

Perhaps you could inform me about something I’m disputing about on another site. When the steam condenses, does it thereby heat up its container/shared atmosphere (if any) in direct transfer of latent heat energy?

Steam condensing is just like sweat evaporating in reverse. So whereas evaporation extracts heat from its surroundings (like your skin) to overcome the latent of vaporisation. Condensation will return exactly the same amount. So water vapour condensing on a cold window or bathroom mirror will warm it up slightly.
So I assumed, and am contending (the heat released by condensation in clouds must warm the surrounding atmosphere, and water freezing on any surface warms it). But I am being assured that it ain’t so.
http://noconsensus.wordpress.com/2010/10/15/where-do-winds-come-from/#comment-38821
http://noconsensus.wordpress.com/2010/10/15/where-do-winds-come-from/#comment-38826

etc.
The dispute continues.

P.S. BTW, James, your PM mailbox is in need of housecleaning. It’s chock-full and you no longer show up on member searches as an eligible recipient! And an attempt to PM you directly from the link here was rejected. :ohh:

Access thru the link in the page header.

[jamesr]

Brian H wrote:
P.S. BTW, James, your PM mailbox is in need of housecleaning. It’s chock-full and you no longer show up on member searches as an eligible recipient! And an attempt to PM you directly from the link here was rejected. :ohh:

Access thru the link in the page header.

I have nothing in my PM box?? very strange – anyway I’ve sent you my direct email details.

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