Recent content by greg136

Ok, thanks for that.

Not for me, I've not done chemistry since GCSE :S Anyway, this is what I've come up with, Li --> Li(+) + e- and FeS(2) + 4Li(+) + 4e- -- > Fe + 2Li(2)S How do they look? Cheers

I've been researching Lithium Iron Disulfide Batteries, but I've been unable to find the half-equations for the Cathode and Anode. Cathode - Iron Disulfide Anode - Lithium Electrolyte - Organic Solvent Blend (Propylene Carbonite, Dioxolane, Dimethoxyethane) The overall equation is...

As the ball is falling, the gPE 'turns' into Kinetic, Heat and Sound energies (albeit, the last two are slight in comparison). Similarly, when the ball hits the ground, it 'loses' Kinetic energy to more heat and sound, and indeed as you said ePE. Conservation of energy means that the ball...

Yeah, I managed a similar set up earlier no probs, however, I need the lights to operate independently, i.e. just one light on at a time.

It's just a project I'm working on. It's supposed to be for a fish tank, so if the water is too hot or cold, the owner is informed by an LED and an alarm. Unfortunately my knowledge of op amps is poor at best :s I'm just reading up on them now, but any input you have would be gratefully...

Great, thanks.

I didn't think Q/W could be greater than 1. Since 1 represents 100% effeciency. If an engine had a Q/W value of 2.1, wouldn't it be working at 210% efficiency??

Homework Statement I need to design a circuit that measures the temperature of a tank of water (using presumably a thermistor) and then displays the temperature by lighting just one of three led lights. For example, if it is too hot, the only the first LED lights up, if it is too cold only...