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Well there is plenty of name-calling and ego-denting going on behind the scenes right now in the murky world of DEA/HIs but all thats for another day! Needless to say, the legal teams are being lined up like Battleships facing each other at River Plate- the only question that needs answering is who is the Graf Spee that is going to get sunk. Confrontation is looking almost inevitable!

Back on the energy theme then, being a keen cyclist I was wondering how long it would take to boil a kettle of water by using the power creating by cycling. So here are some simple calculations:

Assumptions made: water temperature to start with is 20degC, I pedal and produce 300Watts (which I can easily enough, higher wattages available when necessary but I can hold 300 Watts for an hour without complaint)

Thermal energy to boil 1 litre of water = (mass of water - kg) x (specific heat capacity of water J/kgdegC) x (temperature rise degC)
Q = 1 x 4180 x (100-20) = 334400 Joules

Time taken to boil 1 litre of water is: 334400 Joules/300Watts = 1114.66 seconds = 18mins 35 secs.

So you just have to make sure you start pedalling before Coronation St starts if you want a cuppa in the advert break.

Labels: NRG Experts pedalling cycling to make a cup of tea.