World Wide Power Off

[astrid]

Should go see the neighbour across the fence, he's out there right now working in the garden with all his flood lights on it in the whole yard, like he does every night all night
I'm quite harmless really.

Have you been watching "rear window" again?
Astrid

[Stuart]

Refer to groggys post.

Astrid

We both wrote at the same time - mine just took me longer to type.

[Waldo]

I'm turning off Mac now, the lounge light turned off automatically. Neighbour's place is lit up like a Christmas tree.



G'night.

[Lignum]

I`ll do my bit and turn the hot tub off for an hour

[wheelinround]

Lauren & Astrid

Its a top idea but the ones who use power the most are business, large corporations & Government & councils look at any City or major town at night.

Office blocks a blaze with neon signs, office lighting on when no-one is there. Shops with electrical gear such as TV's sound systems running 24/7. Schools demanding airconditioning & heating, banks of class room computers.

Where as we spend approx 7 out of 24 hours at home using appliances. The biggest general home power supply usage comes from Washing machines, Fridges, Dish washers, stoves.

Walk around the school look at wasted power there and ask why??????

[nev25]

I realize Lauren is only 14
But I'm confused as to what is trying to be achieved

[wheelinround]

I realize Lauren is only 14
But I'm confused as to what is trying to be achieved

Electrical heat reduction

[Gra]

Nev,

The idea is that the developed world reduces the amount of electricity used for 1 hour, to reduce the amount of greenhouse gasses released in making the electricity

[Lignum]

Last weeks promotion was good. A 32-metre light globe-shaped hotair balloon burned so much gas and emitted so much carbon dioxide - that its estimated to be the equilavent of turning off 10,000 light bulbs

[Chumley]

What I can't figure out is the scary idea that with global warming the sea level will rise and everyone who lives near the coast (sorry SilentC) will have to grow web feet.

Water is the opposite of most things in terms of expansion/contraction and cooling/heating. How many of us filled a plastic bottle with water and put the lid on before chucking it in the freezer - only to find that when it froze the bottle burst. Water that freezes takes up more space as ice. So if you put ice cubes in a glass and fill the glass with a drink when the ice melts the drink doesn't overflow.

As ice melts it takes up less space, so why wouldn't you think sea levels would fall...

Curiously,
Adam

[silentC]

The answer to that is that a huge volume of the water held in ice is currently ABOVE sea level (glacial ice for one) and when it melts, it will flow into the sea.

I'm not sure about icebergs/ice shelves though. Take an iceberg - 1/10 of the volume is above water and 9/10 below. If you melt the ice, will the 1/10 above simply cancel out the contraction of the 9/10 below?

[silentC]

Here you go: http://www.physorg.com/news5619.html

[silentC]

And this from Wikipedia, referenced from a scientific paper:

If small glaciers and polar ice caps on the margins of Greenland and the Antarctic Peninsula melt, the projected rise in sea level will be around 0.5 m. Melting of the Greenland ice sheet would produce 7.2 m of sea-level rise, and melting of the Antarctic ice sheet would produce 61.1 m of sea level rise.^[3] The collapse of the grounded interior reservoir of the West Antarctic Ice Sheet would raise sea level by 5-6 m.

[silentC]

If the Antarctic Ice Sheet melts, I'm moving to a seaside suburb in Canberra.

Otherwise, we're OK.

[Chumley]

The answer to that is that a huge volume of the water held in ice is currently ABOVE sea level (glacial ice for one) and when it melts, it will flow into the sea.

I'm not sure about icebergs/ice shelves though. Take an iceberg - 1/10 of the volume is above water and 9/10 below. If you melt the ice, will the 1/10 above simply cancel out the contraction of the 9/10 below?

Doesn't matter what the science is, if you melt ice cubes in a glass of drink the drink level drops. Ice cubes will float with the same proportion of ice above water as icebergs. The only way you could explain sea level rise is if ice on land melts - but the Arctic has no land. So who knows.

You'd be welcome in Canberra - don't forget your picture for my wall!

Cheers,
Adam