Surely the amount of energy needed to spin a planet the size of the earth must be immense. My idea would be to insert some sort of driveshaft at one of the exact earth poles. The driveshaft must then turn with the earth, as it rotates on it's own axis - much like spinning a toffee apple on a stick, but in reverse. So, if the driveshaft is now turning, albeit very slowly, it must be possible to attach some sort of drivewheel to the shaft and then through some clever gearing, be able to produce free and clean 'planet powered' energy for all?

Surbian

Chelmsford

 it's very strange.......

Think of this in the way money can be married to people in certain ways by the number of partners, spouses they have and the relationship they have with them. This is not a joke to many people who probably have no concept of the fact they're being exploited.

For example, oak trees planted at a wide spacing tend to grow broad and massive, whereas if closely spaced they are more spindly, but there are far more of them per hectare.

A few years ago I was fishing on a lough in Donegal. The water level had been raised by approximately 20cm by securing a plank of wood across the outflowing river. The area of the lough is about 10 km sq, so by my calculations the plank is holding back 2 million tonnes of water. But the plank isn't that strong, so how does it work?

many of my friends are making this a special occasion with a bottle of wine and candlelit meals and it occurred to me that this special effort is out of the norm compared with their daily lives and as such they would be consuming greater resources than normal in this hour.  Could it be that they are innadvertently harming the environment rather than saving it?

Hello Last Word,

When I opened my curtains this morning and looked out over a flat part of roof, I noticed that last night's rainwater had turned a bright red colour. (see attached image)

The colour isn't caused by algae, since the water is relatively fresh, and it doesn't appear to be blood either, since there aren't any dead animals on the roof.

Long story short, does anyone have any clue as to what could have caused the bright red colour?

While walking in the hills above Coniston, Cumbria, I came across a lake that was covered in ice formed of loosely joined columns about 5mm in diameter and 50mm long. Does anyone know how they may have formed?

I am learning about buffers and I am stumped with the homework problems given as we did not receive adequate imformation in regards to answering questions. Like: which has the greatest buffer a) 0.40 M CH3COONa/ 0.20M CH3COOH not sure what to do to break down just this one left alone make a choice. or like: deterine pH of 0.40 M CH3COOH do pH of 1.00 L buffer of 1.00 M CH3NOONa/1.00M CH3COOH before and after the addition of 0.80 mol of NAoh and 0.12 mol HCl no volume change. Having trouble finding proper examples to build on. Could really use some help.

As a young child, I used to love putting the shells like the ones in the picture, into my ear to listen to them. I remember being told that you hear the waves in them. I know that's not entirely true, but what exactly causes the sound we hear? And why don't we hear such sounds if we put other objects like it up to our ear?