Recent content by matthewgill

pixel01 - you have the right idea. i have found this, which is what I am trying to do. I just need to know the psi required for 100degC rather than 1000degC. Can anyone help change the equation? ********* QUESTION What compression ratio Vmax / Vmin will raise the air temperature from...

Hello, We all know that if you compress air the pressure and temperature increase together. But how can I calculate the relationship? For example: What pressure (psi) do I need to compress air to so it is 100degC? Many Thanks, Matthew.

how is that? are they viewable now?

Just a quick question: It is the seebeck effect whereby a directly proportional voltage to the temperature dif is produced. I am wondering whether adding more junctions in that style would produce more electricity. Would this... http://img156.imageshack.us/img156/3140/54089643.jpg...

Newton's Law of Cooling Time Required to Cool (or heat) an Object [Also known as Newton's Law of Cooling] t=mCp(Ts-Tf)/Q Where; Q is the heat added (or being removed) from the object in watts m is the mass (weight) of the object in Kg Cp is the Specific heat of the object...

I have found this fantastic calculator: http://www.ajdesigner.com/phpthermalexpansion/thermal_expansion_equation_volumetric_volume_change.php I need to use it to work out how much Mercury I need to expand it by 50 Litres under temperature. First things first though, i’m getting...

I don't believe so, no. For russ_ watters : what do you calculate the minimum pressure required to be if I needed 2000W and only had 2.5litres per second of water?

I mean, there is no maximum. But obviously I would like to keep it as low as possible and still produce the 2kW with the 1.6 litres p/s... otherwise I am wasting the excess unnecessary energy...

I require 2000W of Electricity from a waterwheel (which can be any size). I only have 1.6 litres-per-second MAX, but any pressure. What pressure of water will I need to turn that waterwheel so it produces 2kW with 1.6 litres of water per second? If possible, please take efficiency into...

The string tension is not lost via the tuning pegs, unless they are of very very low quality. On a guitar for example, they can be locking. It is common that the wood of the instrument expands/contracts with temperature... pulling the strings with it. Sometimes when strings get old they don’t...

Hello, I have found this information on the internet, but just need a few parts explained: http://hyperphysics.phy-astr.gsu.edu/Hbase/electric/farlaw.html For the 'magnet moving into coil' (lower left illustration),where it says ^B/^t=0.4T/s (where '^' is the triangular symbol in the...

Hello, What do i substitute the 'd' and 't' for in this equation: It just didnt say, so i am a bit lost!

Hello, I need a calculation that can tell me how many Volts and Amperes a magnet passing through a coil will produce if you input the magnet strength, speed, number of coils, coil area etc... Is there a common calculation I have missed for theoretically working this out? Or do you have to...