It's too hot :(

There's so many fans on in our bedroom that it sounds like when you stick your head out the window on the motorway.

And its still 29c.

:rolleyes:
 
asim18 said:
Yes I know about vasoconstriction, it has nothing to do with the situation below:

1) When you put your hand under cold water, the water is taking heat energy from your hand and making it go down the drain.

2) Your hand is now cold compared to your body.

2) You body wants to remain in a state of endothermic homoeostasis. (Just like temperature equalization in matter.)

3) To bring your cold hand into thermal equilibrium with the rest of your body, Guess where that heat will come from?.

Yep, the rest of your body.
Click to expand...

1) When I put my hand under the tap then only the epidermis comes into contact with the water. Heat moves from the epidermis into the water. At the same time heat moves from the rest of the hand (the bulk of it) to the epidermis. Heat is also transferred from the core of the body into the hand by convection through the vascular system (and other bits).

2) The epidermis may have changed it's temperature at this point. If the heat lost to the water is greater than the replacement then the temperature will be reduced. If the heat lost is less than the heat gained the temperature will rise.

4) Convective heat transfer to the epidermis of the hand will not occur in meaningful quantities through the vascular system when there is localised vasoconstriction due the triggering of nerves registering.

Rather than not really understanding this try it yourself. Test your capillary refill now:

a) Hold one hand above the level of your heart. Depress the nail on your index finger using the other hand for 5 secs - the nailbed will go white. Still holding that hand with the depressed nail above the level of the heart (we want blood flow here not gravity) release the nail and count the time for the nail to go from white to pink.

b) Put said finger in a freezer compartment for a few minutes. And do the same experiment.

Note how the time increases. That is because there has been local vasoconstriction. There has been reduced blood flow to the periphery due to the natural response to shut down the blood flow to areas of the skin that detect cold.

If you really think that varying areas of the body don't have independant along with central control for their bloodflow you need to work harder at school or you'll fail your exams. I hope you are at school and not at university because if that's the case you really need to hit the books. This is pretty basic stuff. GCSE Level.
 
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I'm laying on me bed in me boxors with a fan blasting next to me and a cold flannel on my head.. it's funny how everyone loses it when it gets too hot, we're all a bunch of fairy's!

When it's too cold we can't it either! ahhhhhhhhhhh
 
SonniLombardi said:
I'm laying on me bed in me boxors with a fan blasting next to me and a cold flannel on my head.. it's funny how everyone loses it when it gets too hot, we're all a bunch of fairy's!

When it's too cold we can't it either! ahhhhhhhhhhh
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The problem in this country is not that we are a bunch of fairy's it's how our bodies adjust to temperature change. We don't go from a gradual 20c to 25 then 30 over a month's period, we go from what was 13C cold north east winds for days on end to suddenly 25, next day 33+. Pretty much from no humidity and heat to intense heat and humidity in a matter of days
 
Holey **** Thunder and lightning storm here in Edinburgh.

So bad the Lightning is like a techno dance floor, Thunder is just not keeping up with the number of flashes. The Thunder is ripping in its noise rather than a single boom!!!

This has been the worst storm I've heard yet in my life, man its exciting !!! :D:D:D
 
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neil_g said:
I've got their app, south of Manchester and Durham are buzzing.
Click to expand...

It was mental for about an hour with sheet lightning around 10ish. Made the Chemical Brothers set at Glastonbury look puny and insignificant. No specific Thunder, more a background growling similar to when I've eaten too much Chinese food.

It's been gloriously non-humid now for a couple of hours. :D
 
21rhau.jpg



:D:eek:
 
The mother of all thunderstorms has been hitting Newcastle for the last hour and seems relentless

blight flashes every few seconds, hailstones pounding on the windows like stones

Bet some areas are flooded lol, rain sounds like a train passing by
 
Xordium said:
1) When I put my hand under the tap then only the epidermis comes into contact with the water. Heat moves from the epidermis into the water. At the same time heat moves from the rest of the hand (the bulk of it) to the epidermis. Heat is also transferred from the core of the body into the hand by convection through the vascular system (and other bits).

2) The epidermis may have changed it's temperature at this point. If the heat lost to the water is greater than the replacement then the temperature will be reduced. If the heat lost is less than the heat gained the temperature will rise.

4) Convective heat transfer to the epidermis of the hand will not occur in meaningful quantities through the vascular system when there is localised vasoconstriction due the triggering of nerves registering.

Rather than not really understanding this try it yourself. Test your capillary refill now:

a) Hold one hand above the level of your heart. Depress the nail on your index finger using the other hand for 5 secs - the nailbed will go white. Still holding that hand with the depressed nail above the level of the heart (we want blood flow here not gravity) release the nail and count the time for the nail to go from white to pink.

b) Put said finger in a freezer compartment for a few minutes. And do the same experiment.

Note how the time increases. That is because there has been local vasoconstriction. There has been reduced blood flow to the periphery due to the natural response to shut down the blood flow to areas of the skin that detect cold.

If you really think that varying areas of the body don't have independant along with central control for their bloodflow you need to work harder at school or you'll fail your exams. I hope you are at school and not at university because if that's the case you really need to hit the books. This is pretty basic stuff. GCSE Level.
Click to expand...

I really cant be bothered reading past the first paragraph but I did anyway.

I basically said when you put your hand under cold water your hand goes cold, and you've basically agreed with it in your first paragraph, but you've extruded it into a ridiculously extrapolated statement which gives the impression that you know what you're talking about. The fact is you're wrong even in the way you talk about heat transfer...

... Your hand, including the epidermis, fluid/blood including bones is considered a "body". Just because heat exchange with water occurs at your skin does not detract my statement that heat is removed from the hand by the water.


And then you've bought in vasoconstriction from nowhere, and assumed I deny that it even exists (which I've already told you know exactly how it works) and you seem to think it makes it impossible for heat transfer to occur within the "body" itself. All it does is makes it less efficient.

And then you've bought in GCSEs which just back's up the nature/style of your first paragraph :D
 
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omg, nearly 2am and it's 28c in my room, just gtfo.

i've applied roll-on anti-persperant to my male area and butt cheecks, seems to be working so far...
 
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