Recent content by matthewgill

  1. M

    How Can I Calculate the PSI Needed to Compress Air to 100°C?

    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...
  2. M

    How Can I Calculate the PSI Needed to Compress Air to 100°C?

    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.
  3. M

    Can Adding More Junctions Increase Thermoelectricity Production?

    how is that? are they viewable now?
  4. M

    Can Adding More Junctions Increase Thermoelectricity Production?

    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...
  5. M

    Newton's Law of Cooling. little question about 'Specific heat' of Mercury

    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...
  6. M

    Mercury: expansion with temperature

    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...
  7. M

    What Water Pressure is Needed to Generate 2kW with 1.6 Liters per Second?

    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?
  8. M

    What Water Pressure is Needed to Generate 2kW with 1.6 Liters per Second?

    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...
  9. M

    What Water Pressure is Needed to Generate 2kW with 1.6 Liters per Second?

    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...
  10. M

    Freq change- string under const tension

    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...
  11. M

    Faraday's Law Help - Find Answers Here!

    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...
  12. M

    Equation help desperately needed Faraday Equation.

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

    Is there a calculation to work-out the products of simple magnet-coil induction?

    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...
Back
Top